.page-contact {
  --coop-dark-line: rgba(201, 216, 214, 0.24);
  --coop-on-dark: rgba(246, 241, 228, 0.78);
  background: var(--cream);
  overflow-x: hidden;
}

.page-contact .coop-title {
  font-weight: 200;
  letter-spacing: -0.02em;
  line-height: 1.06;
  margin: 12px 0 20px;
  color: var(--ink);
  font-size: clamp(38px, 9vw, 92px);
}

.page-contact .coop-lead {
  max-width: 46ch;
  color: var(--ink);
}

/* 首屏 */
.page-contact .coop-hero {
  padding: 8px 0 clamp(36px, 7vw, 76px);
}

.page-contact .coop-hero-grid {
  display: grid;
  gap: 28px;
}

.page-contact .coop-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
}

.page-contact .coop-stat {
  flex: 1 1 120px;
  background: var(--cream-soft);
  border-radius: var(--r-md);
  padding: 14px 16px 12px;
  border-bottom: 3px solid var(--teal);
}

.page-contact .coop-stat dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--teal);
  font-weight: 700;
}

.page-contact .coop-stat dd {
  margin: 6px 0 0;
  font-size: 30px;
  line-height: 1;
  color: var(--indigo);
  font-weight: 700;
}

/* 联系卡 */
.page-contact .coop-card {
  background: linear-gradient(160deg, var(--indigo) 0%, var(--indigo-deep) 100%);
  color: var(--cream);
  border-radius: var(--r-lg);
  padding: clamp(22px, 5vw, 30px);
  box-shadow: var(--shadow-card);
}

.page-contact .coop-card .eyebrow {
  color: var(--ice);
}

.page-contact .coop-card-title {
  margin: 10px 0 18px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--cream);
}

.page-contact .coop-card-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .coop-card-list li {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--coop-dark-line);
}

.page-contact .coop-card-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .coop-card-key {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ice);
}

.page-contact .coop-card-val {
  font-size: 16px;
  line-height: 1.6;
  color: var(--cream);
  overflow-wrap: anywhere;
}

.page-contact .coop-card-note {
  margin: 0 0 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--coop-on-dark);
}

.page-contact .coop-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* 合作方向 */
.page-contact .coop-dirs-section {
  padding-top: clamp(20px, 4vw, 36px);
}

.page-contact .coop-dirs-head {
  display: grid;
  gap: 12px;
  margin-bottom: 26px;
}

.page-contact .coop-dirs-head .section-title {
  font-size: clamp(26px, 5.4vw, 42px);
  line-height: 1.16;
}

.page-contact .coop-dirs {
  display: grid;
  gap: 16px;
}

.page-contact .coop-dir {
  background: var(--cream-soft);
  border-radius: var(--r-lg);
  padding: 22px 20px;
  border-top: 4px solid var(--teal);
  box-shadow: 0 10px 26px rgba(14, 44, 79, 0.06);
}

.page-contact .coop-dir:nth-child(2) {
  border-top-color: var(--orange);
}

.page-contact .coop-dir:nth-child(3) {
  border-top-color: var(--ice);
}

.page-contact .coop-dir:nth-child(4) {
  border-top-color: var(--green);
}

.page-contact .coop-dir-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
}

.page-contact .coop-dir-no {
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.06em;
}

.page-contact .coop-dir-title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--indigo);
}

.page-contact .coop-dir-list {
  margin: 0;
  display: grid;
  gap: 4px;
}

.page-contact .coop-dir-list dt {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--teal);
  margin-top: 8px;
}

.page-contact .coop-dir-list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

.page-contact .coop-figure {
  margin: 26px 0 0;
}

.page-contact .coop-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--r-lg);
}

/* 流程赛道 */
.page-contact .coop-flow-section .section-title {
  font-size: clamp(26px, 5.4vw, 42px);
  line-height: 1.16;
  color: var(--cream);
}

.page-contact .coop-flow-section .section-note {
  color: var(--coop-on-dark);
}

.page-contact .coop-flow-section .eyebrow {
  color: var(--orange);
}

.page-contact .coop-track {
  list-style: none;
  position: relative;
  margin: 28px 0 0;
  padding: 0 0 0 28px;
  display: grid;
  gap: 16px;
}

.page-contact .coop-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--ice), var(--orange));
}

.page-contact .coop-step {
  position: relative;
  background: rgba(246, 241, 228, 0.07);
  border: 1px solid var(--coop-dark-line);
  border-radius: var(--r-md);
  padding: 20px;
}

.page-contact .coop-step::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px var(--indigo-deep);
}

.page-contact .coop-step-no {
  font-size: 13px;
  color: var(--ice);
  letter-spacing: 0.08em;
}

.page-contact .coop-step-title {
  margin: 8px 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--cream);
}

.page-contact .coop-step-text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--coop-on-dark);
}

.page-contact .coop-step-time {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  background: rgba(255, 106, 43, 0.16);
  color: var(--orange);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* 联系渠道 */
.page-contact .coop-channels {
  display: grid;
  gap: 26px;
}

.page-contact .coop-channel-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .coop-channel {
  background: var(--cream-soft);
  border-left: 4px solid var(--indigo);
  border-radius: var(--r-md);
  padding: 16px 18px;
}

.page-contact .coop-channel-key {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.page-contact .coop-channel-val {
  margin: 6px 0 8px;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .coop-channel-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  opacity: 0.78;
}

.page-contact .coop-channels-side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-contact .coop-channels-side img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  border-radius: var(--r-lg);
}

.page-contact .coop-channels-tip {
  background: var(--teal);
  color: var(--cream);
  border-radius: var(--r-lg);
  padding: 20px;
}

.page-contact .coop-tip-title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-contact .coop-tip-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(246, 241, 228, 0.9);
}

/* 素材与规范 */
.page-contact .coop-spec-grid {
  display: grid;
  gap: 14px;
}

.page-contact .coop-spec {
  background: var(--cream-soft);
  border-radius: var(--r-md);
  padding: 20px;
  border-top: 3px solid var(--orange);
}

.page-contact .coop-spec:nth-child(2) {
  border-top-color: var(--teal);
}

.page-contact .coop-spec:nth-child(3) {
  border-top-color: var(--green);
}

.page-contact .coop-spec .card-title {
  margin: 0 0 10px;
  font-size: 17px;
  color: var(--indigo);
}

.page-contact .coop-spec .card-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

/* 常见问题 */
.page-contact .coop-faq-wrap {
  display: grid;
  gap: 24px;
  align-items: start;
}

.page-contact .coop-faq-side .section-title {
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.2;
}

.page-contact .coop-faq-side a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .coop-faq {
  display: grid;
  gap: 10px;
}

.page-contact .coop-faq-item {
  background: var(--cream-soft);
  border-radius: var(--r-md);
  padding: 16px 18px;
}

.page-contact .coop-faq-item summary {
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--indigo);
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

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

.page-contact .coop-faq-item summary::before {
  content: "+";
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  line-height: 18px;
  text-align: center;
  border-radius: 50%;
  background: var(--sand);
  color: var(--indigo);
  font-size: 14px;
  font-weight: 700;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.page-contact .coop-faq-item[open] summary::before {
  content: "−";
  background: var(--orange);
  color: var(--ink);
}

.page-contact .coop-faq-item p {
  margin: 12px 0 0 32px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .coop-faq-item a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 断点 */
@media (min-width: 640px) {
  .page-contact .coop-dirs,
  .page-contact .coop-spec-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .coop-hero-grid {
    grid-template-columns: minmax(0, 1fr) 356px;
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-contact .coop-card {
    position: sticky;
    top: 28px;
  }

  .page-contact .coop-dirs-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    align-items: end;
    gap: 32px;
  }

  .page-contact .coop-dirs-head .section-note {
    margin-bottom: 6px;
  }

  .page-contact .coop-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    padding: 26px 0 0;
  }

  .page-contact .coop-track::before {
    left: 6%;
    right: 6%;
    top: 14px;
    bottom: auto;
    width: auto;
    height: 3px;
    background: linear-gradient(90deg, var(--ice), var(--orange));
  }

  .page-contact .coop-step::before {
    left: 20px;
    top: -18px;
  }

  .page-contact .coop-channels {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(28px, 4vw, 56px);
  }

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

  .page-contact .coop-faq-wrap {
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
    gap: clamp(28px, 4vw, 64px);
  }
}

@media (min-width: 1180px) {
  .page-contact .coop-dirs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .coop-dir {
    padding: 24px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-faq-item summary::before {
    transition: none;
  }
}