.page-contact {
  --co-gap: clamp(18px, 2.4vw, 32px);
  --co-panel-pad: clamp(20px, 3vw, 34px);
  display: block;
  background: var(--ink-0);
  color: var(--white);
  font-family: var(--font-cn);
  overflow-x: clip;
}

.page-contact .section {
  padding: clamp(48px, 7vh, 92px) 0;
}

.page-contact a {
  color: inherit;
}

.page-contact a:hover {
  color: var(--lime);
}

.page-contact .eyebrow {
  color: var(--muted);
}

/* ---------- 首屏 ---------- */

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

.page-contact .co-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
}

.page-contact .co-hero__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(5, 17, 13, 0.95) 0%, rgba(5, 17, 13, 0.6) 46%, rgba(5, 17, 13, 0.94) 100%);
}

.page-contact .co-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(56px, 9vh, 118px);
  padding-bottom: clamp(44px, 8vh, 96px);
}

.page-contact .co-hero .crumbs {
  margin-bottom: clamp(20px, 3vh, 36px);
}

.page-contact .co-hero .h-display {
  max-width: 17ch;
  margin: 10px 0 18px;
  color: var(--white);
}

.page-contact .co-hero .lede {
  max-width: 58ch;
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .co-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3vh, 34px);
}

/* ---------- 左右分屏 ---------- */

.page-contact .co-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--co-gap);
  align-items: start;
}

@media (min-width: 1024px) {
  .page-contact .co-split {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(24px, 3vw, 52px);
  }
}

.page-contact .co-side__card {
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  border-radius: var(--radius-lg);
  background: var(--ink-1);
  padding: clamp(20px, 2.4vw, 28px);
}

@media (min-width: 1024px) {
  .page-contact .co-side__card {
    position: sticky;
    top: 24px;
  }
}

.page-contact .co-side__lead {
  margin: 10px 0 4px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--white);
}

.page-contact .co-side__list {
  margin: 6px 0 0;
  padding: 0;
}

.page-contact .co-side__row {
  display: grid;
  gap: 5px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.page-contact .co-side__row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-contact .co-side__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  word-break: break-word;
  color: var(--white);
}

.page-contact .co-side__note {
  margin: 16px 0 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .co-side__btn {
  width: 100%;
  justify-content: center;
}

/* ---------- 右侧长栏 ---------- */

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

.page-contact .co-block {
  margin-top: clamp(36px, 5vh, 64px);
}

.page-contact .co-block:first-child {
  margin-top: 0;
}

.page-contact .co-block__head {
  margin-bottom: clamp(16px, 2vw, 24px);
}

.page-contact .co-block__head .eyebrow,
.page-contact .co-block > .eyebrow {
  color: var(--cyan);
}

.page-contact .co-block__head .h-sec {
  margin: 8px 0 12px;
}

.page-contact .co-block .prose {
  max-width: 62ch;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .co-block .prose a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-contact .co-linkline {
  margin-top: 18px !important;
  color: var(--white) !important;
}

/* ---------- 四张不等大合作卡片 ---------- */

.page-contact .co-modes__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(18px, 2.4vw, 28px);
}

@media (min-width: 860px) {
  .page-contact .co-modes__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-contact .co-mode:nth-child(1) { grid-column: span 7; }
  .page-contact .co-mode:nth-child(2) { grid-column: span 5; }
  .page-contact .co-mode:nth-child(3) { grid-column: span 5; }
  .page-contact .co-mode:nth-child(4) { grid-column: span 7; }
}

.page-contact .co-mode {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-2);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .co-mode[open] {
  border-color: var(--lime);
  background: var(--ink-1);
}

.page-contact .co-mode__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px clamp(16px, 2vw, 22px);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .co-mode__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lime);
}

.page-contact .co-mode[open] .co-mode__head::after {
  content: "–";
}

.page-contact .co-mode__head:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-contact .co-mode__num {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-contact .co-mode__title {
  font-size: 19px;
  font-weight: 600;
  color: var(--white);
}

.page-contact .co-mode__hint {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-contact .co-mode__body {
  padding: 16px clamp(16px, 2vw, 22px) 20px;
  border-top: 1px solid var(--line);
}

.page-contact .co-mode__body p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .co-mode__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .co-mode__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--white);
}

.page-contact .co-mode__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------- 数字条 ---------- */

.page-contact .co-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(18, 48, 38, 0.62);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-contact .co-facts__num {
  flex: none;
  font-size: 22px;
  font-weight: 600;
  color: var(--cyan);
}

/* ---------- 五步流程轨道 ---------- */

.page-contact .co-flow {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(11, 31, 24, 0.9) 0%, rgba(5, 17, 13, 1) 100%);
}

.page-contact .co-track__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  background: none;
  border: 0;
}

@media (min-width: 900px) {
  .page-contact .co-track__list {
    position: relative;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .co-track__list::before {
    content: "";
    position: absolute;
    left: 26px;
    right: 26px;
    top: 38px;
    height: 1px;
    background: var(--line);
    z-index: 0;
  }
}

.page-contact .co-step {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--ink-1);
  color: var(--white);
  font-family: inherit;
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .co-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--ink-2);
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .co-step__name {
  font-weight: 600;
}

.page-contact .co-step:hover {
  border-color: var(--cyan);
}

.page-contact .co-step[aria-selected="true"] {
  border-color: var(--lime);
  background: var(--ink-2);
}

.page-contact .co-step[aria-selected="true"] .co-step__num {
  border-color: var(--orange);
  background: var(--ink-0);
  color: var(--orange);
}

@media (min-width: 900px) {
  .page-contact .co-step {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border-radius: var(--radius-lg);
  }
}

.page-contact .co-track__panels {
  margin-top: 18px;
  padding: var(--co-panel-pad);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-lg);
  background: var(--ink-1);
}

.page-contact .co-track__panel .h-sub {
  margin: 0 0 10px;
}

.page-contact .co-track__panel p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 联系方式 ---------- */

.page-contact .co-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--co-gap);
  align-items: start;
}

@media (min-width: 900px) {
  .page-contact .co-contact__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(24px, 3vw, 52px);
  }
}

.page-contact .co-contact__body .h-sec {
  margin: 8px 0 14px;
}

.page-contact .co-contact__body .prose {
  max-width: 60ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .co-channels {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-channel {
  display: grid;
  gap: 7px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-1);
}

.page-contact .co-channel__label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-contact .co-channel__value {
  font-family: var(--font-mono);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  word-break: break-word;
  color: var(--white);
}

.page-contact .co-channel__note {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .co-contact__tip {
  margin: 22px 0 0;
  padding: 14px 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .co-contact__tip a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-contact .co-contact__media {
  margin: 0;
  aspect-ratio: 10 / 7;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-contact .co-contact__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 合作常见问题 ---------- */

.page-contact .co-faq__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--co-gap);
  align-items: start;
}

@media (min-width: 900px) {
  .page-contact .co-faq__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(24px, 3vw, 52px);
  }
}

.page-contact .co-faq__head .h-sec {
  margin: 8px 0 12px;
}

.page-contact .co-faq__head .prose {
  max-width: 40ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .co-faq__list {
  display: grid;
  gap: 12px;
}

.page-contact .co-qa {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-1);
  padding: 0 clamp(16px, 2vw, 22px);
  transition: border-color var(--dur) var(--ease);
}

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

.page-contact .co-qa > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--white);
}

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

.page-contact .co-qa > summary::before {
  content: "?";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
}

.page-contact .co-qa > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
}

.page-contact .co-qa > p {
  margin: 0 0 20px;
  padding-left: 38px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 收尾行动带 ---------- */

.page-contact .co-cta {
  border-top: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(18, 48, 38, 0.95) 0%, rgba(11, 31, 24, 1) 65%);
  padding: clamp(32px, 5vh, 58px) 0;
}

.page-contact .co-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.page-contact .co-cta__lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.6vw, 20px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
}

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

/* ---------- 无障碍与动效 ---------- */

.page-contact .co-mode__head:focus-visible,
.page-contact .co-step:focus-visible,
.page-contact a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-mode,
  .page-contact .co-step,
  .page-contact .co-step__num,
  .page-contact .co-qa {
    transition: none;
  }
}
<<<END>>>