.page-contact {
  --coop-pad-y: clamp(44px, 7vw, 84px);
  --coop-border: 1px solid var(--line-soft);
  color: var(--paper-100);
  overflow-x: clip;
}

.page-contact .blueprint-meta {
  margin-top: 8px;
}

/* ---------- 首屏 ---------- */
.page-contact .coop-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
  align-items: center;
  padding: clamp(28px, 5vw, 48px) 0 clamp(40px, 7vw, 80px);
  border-bottom: var(--coop-border);
}

.page-contact .coop-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-contact .coop-hero .lede {
  margin: 0 0 26px;
  max-width: 34em;
  color: var(--mist-300);
}

.page-contact .coop-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.page-contact .coop-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 18px 0 0;
  border-top: var(--coop-border);
}

.page-contact .coop-hero__stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
}

.page-contact .coop-hero__stat dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist-300);
}

.page-contact .coop-hero__stat dd {
  margin: 0;
  font-size: 22px;
  color: var(--accent-400);
  letter-spacing: 0.02em;
}

.page-contact .media-frame.coop-hero__figure {
  position: relative;
  margin: 0;
  padding: 0;
  aspect-ratio: 3 / 2;
  border: var(--coop-border);
  background: var(--ink-700);
  overflow: hidden;
}

.page-contact .media-frame.coop-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .coop-hero__figure::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(61, 224, 200, 0.35);
  pointer-events: none;
}

/* ---------- 章节头 ---------- */
.page-contact .coop-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}

.page-contact .coop-head__num {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--coral-500);
}

.page-contact .coop-head__title {
  margin: 0;
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-contact .coop-lede {
  margin: 0 0 clamp(24px, 4vw, 42px);
  max-width: 58ch;
  color: var(--mist-300);
  line-height: 1.75;
}

/* ---------- 合作形式 ---------- */
.page-contact .coop-forms {
  padding: var(--coop-pad-y) 0;
}

.page-contact .coop-forms__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-contact .coop-card {
  position: relative;
  padding: 24px 20px 26px;
  border: var(--coop-border);
  background: var(--ink-700);
  transition: transform var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
}

.page-contact .coop-card--b {
  background: var(--teal-600);
}

.page-contact .coop-card--c {
  background: var(--violet-700);
}

.page-contact .coop-card:hover,
.page-contact .coop-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--accent-400);
  box-shadow: inset 0 0 0 1px var(--accent-400);
}

.page-contact .coop-card__index {
  display: block;
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--mist-300);
  transition: color var(--t-fast) var(--ease);
}

.page-contact .coop-card:hover .coop-card__index {
  color: var(--coral-500);
}

.page-contact .coop-card__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.6vw, 24px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-contact .coop-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-100);
  opacity: 0.9;
}

.page-contact .coop-card__facts {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(242, 246, 247, 0.18);
  display: grid;
  gap: 14px;
}

.page-contact .coop-card__facts dt {
  margin-bottom: 4px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent-200);
}

.page-contact .coop-card__facts dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-100);
}

/* ---------- 流程 ---------- */
.page-contact .coop-flow {
  position: relative;
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--ink-900);
  border-top: var(--coop-border);
  overflow: hidden;
}

.page-contact .coop-flow__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
  opacity: 0.14;
  pointer-events: none;
}

.page-contact .coop-flow__bg img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .coop-flow__inner {
  position: relative;
  z-index: 1;
}

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

.page-contact .coop-step {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 28px;
}

.page-contact .coop-step::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 44px;
  bottom: 0;
  width: 1px;
  background: var(--line-soft);
}

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

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

.page-contact .coop-step__num {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--accent-400);
  background: var(--ink-900);
  color: var(--accent-400);
  font-size: 13px;
  letter-spacing: 0.06em;
  position: relative;
  z-index: 1;
}

.page-contact .coop-step__title {
  margin: 6px 0 8px;
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 800;
  line-height: 1.3;
}

.page-contact .coop-step__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-contact .coop-step details {
  margin-top: 14px;
  max-width: 58ch;
  padding: 10px 14px;
  border: var(--coop-border);
  background: rgba(6, 26, 43, 0.72);
}

.page-contact .coop-step details[open] {
  border-color: var(--accent-200);
}

.page-contact .coop-step summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent-200);
  list-style: none;
}

.page-contact .coop-step summary::-webkit-details-marker {
  display: none;
}

.page-contact .coop-step summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--coral-500);
  font-size: 14px;
}

.page-contact .coop-step details[open] summary::before {
  content: "−";
}

.page-contact .coop-step details ul {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-contact .coop-step details li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper-100);
}

.page-contact .coop-step details li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 1px;
  background: var(--accent-400);
}

/* ---------- 合作落点 ---------- */
.page-contact .coop-assets {
  padding: var(--coop-pad-y) 0;
}

.page-contact .coop-assets__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: var(--coop-border);
}

.page-contact .coop-asset {
  padding: 22px 0;
  border-bottom: var(--coop-border);
}

.page-contact .coop-asset__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 800;
}

.page-contact .coop-asset p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-300);
}

/* ---------- 联系 ---------- */
.page-contact .coop-contact {
  position: relative;
  margin-top: clamp(20px, 4vw, 48px);
  padding: clamp(64px, 10vw, 108px) 0 clamp(48px, 7vw, 80px);
  background: var(--teal-600);
  clip-path: polygon(0 36px, 100% 0, 100% 100%, 0 100%);
}

.page-contact .coop-contact__kicker {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--accent-400);
}

.page-contact .coop-contact h2 {
  margin: 0 0 14px;
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-contact .coop-contact__intro {
  margin: 0 0 clamp(24px, 4vw, 40px);
  max-width: 56ch;
  line-height: 1.75;
  color: var(--paper-100);
  opacity: 0.88;
}

.page-contact .coop-contact__list {
  margin: 0;
  border-top: 1px solid rgba(242, 246, 247, 0.24);
}

.page-contact .coop-contact__row {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(242, 246, 247, 0.24);
}

.page-contact .coop-contact__row dt {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--accent-200);
}

.page-contact .coop-contact__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 20px);
  color: var(--paper-100);
  overflow-wrap: anywhere;
}

.page-contact .coop-contact__row dd a {
  color: var(--paper-100);
  text-decoration: underline;
  text-decoration-color: var(--accent-400);
  text-underline-offset: 4px;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .coop-contact__row dd a:hover {
  color: var(--accent-200);
}

.page-contact .coop-contact__note {
  margin-top: 28px;
  max-width: 70ch;
  padding: 16px 18px;
  background: rgba(6, 26, 43, 0.46);
  color: var(--paper-100);
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .coop-contact__note p {
  margin: 0;
}

.page-contact .coop-contact__note a {
  color: var(--accent-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 延伸入口 ---------- */
.page-contact .coop-preview {
  padding: var(--coop-pad-y) 0 clamp(56px, 8vw, 96px);
}

.page-contact .coop-preview__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-contact .coop-preview__link {
  display: block;
  height: 100%;
  padding: 20px 18px;
  border: var(--coop-border);
  background: var(--ink-700);
  color: var(--paper-100);
  text-decoration: none;
  transition: transform var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.page-contact .coop-preview__link:hover,
.page-contact .coop-preview__link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent-400);
}

.page-contact .coop-preview__label {
  display: block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--coral-500);
}

.page-contact .coop-preview__title {
  display: block;
  margin-bottom: 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-contact .coop-preview__desc {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-300);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-contact .coop-contact__row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 800px) {
  .page-contact .coop-assets__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
    border-top: 0;
  }

  .page-contact .coop-asset {
    padding: 20px 0 0;
    border-bottom: 0;
    border-top: 2px solid var(--accent-400);
  }

  .page-contact .coop-preview__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-contact .coop-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-contact .coop-forms__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
  }

  .page-contact .coop-card--b {
    margin-top: 40px;
  }

  .page-contact .coop-card--c {
    margin-top: 80px;
  }

  .page-contact .coop-step {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 22px;
    padding-bottom: 32px;
  }

  .page-contact .coop-step__num {
    width: 52px;
    height: 52px;
  }

  .page-contact .coop-step::before {
    left: 25px;
    top: 52px;
  }
}

@media (min-width: 1120px) {
  .page-contact .coop-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-contact .coop-card {
    padding: 28px 24px 30px;
  }
}
<<<END>>>