.page-contact {
  --co-cut: 28px;
  --co-gap: clamp(22px, 3.4vw, 44px);
  background: var(--paper);
  color: var(--seed);
  font-family: var(--font-body);
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.4vw, 52px) 0 clamp(30px, 4.6vw, 54px);
  background: var(--paper);
}

.page-contact .co-hero::after {
  content: "";
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: 0;
  height: 8px;
  background: linear-gradient(90deg, var(--kiwi-core), var(--kiwi-flesh) 38%, var(--kiwi-glow) 64%, var(--skin-light));
  transform: rotate(-1.1deg);
  transform-origin: left center;
}

.page-contact .co-hero-grid {
  display: grid;
  gap: clamp(22px, 3vw, 42px);
  align-items: end;
}

@media (min-width: 900px) {
  .page-contact .co-hero-grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  }
}

.page-contact .co-hero-copy {
  position: relative;
  z-index: 1;
}

.page-contact .co-h1 {
  font-size: clamp(30px, 6.2vw, 52px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
  padding-bottom: 4px;
  color: var(--seed);
}

.page-contact .co-lead {
  margin: 0 0 18px;
  max-width: 42ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  opacity: 0.84;
}

.page-contact .co-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .co-hero-tags .tag {
  display: inline-block;
  padding: 5px 13px;
  background: var(--pale-green);
  color: var(--seed);
  border: 1px solid rgba(107, 74, 43, 0.26);
  font-size: 13px;
  line-height: 1.5;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
}

.page-contact .co-hero-media {
  position: relative;
  aspect-ratio: 14 / 9;
  overflow: hidden;
  background: linear-gradient(140deg, var(--pale-green), var(--skin-light));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}

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

/* ---------- 主体分屏 ---------- */
.page-contact .co-split {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
  padding-block: clamp(32px, 5vw, 64px);
}

@media (min-width: 1000px) {
  .page-contact .co-split {
    grid-template-columns: minmax(0, 1.62fr) minmax(300px, 1fr);
    align-items: start;
  }
}

.page-contact .co-block {
  margin-bottom: clamp(34px, 5vw, 62px);
}

.page-contact .co-block:last-child {
  margin-bottom: 0;
}

.page-contact .section-head {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-contact .section-head h2 {
  margin: 6px 0 0;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--seed);
}

/* ---------- 四类合作方向 ---------- */
.page-contact .co-directions-list {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-contact .co-dir {
  position: relative;
  padding: clamp(20px, 2.6vw, 28px) clamp(18px, 2.6vw, 30px);
  background: var(--paper-light);
  border-left: 6px solid var(--kiwi-flesh);
  clip-path: polygon(0 0, calc(100% - var(--co-cut)) 0, 100% var(--co-cut), 100% 100%, 0 100%);
  transition: transform var(--dur) ease, border-color var(--dur) ease;
}

.page-contact .co-dir:nth-child(2) {
  background: var(--pale-green);
  border-left-color: var(--kiwi-core);
}

.page-contact .co-dir:nth-child(3) {
  background: #EFE2CE;
  border-left-color: var(--skin-light);
}

.page-contact .co-dir:nth-child(4) {
  background: var(--skin);
  border-left-color: var(--kiwi-glow);
  color: #F1EADA;
}

.page-contact .co-dir:nth-child(4) h3 {
  color: var(--paper-light);
}

.page-contact .co-dir:nth-child(4) .co-dir-for {
  color: var(--kiwi-glow);
  border-left-color: rgba(200, 255, 61, 0.5);
}

.page-contact .co-dir:nth-child(4) .tag {
  background: rgba(200, 255, 61, 0.16);
  color: var(--kiwi-glow);
  border-color: rgba(200, 255, 61, 0.5);
}

.page-contact .co-dir:nth-child(4) .co-dir-list li::before {
  background: var(--kiwi-glow);
}

.page-contact .co-dir h3 {
  margin: 10px 0 8px;
  font-size: clamp(20px, 2.2vw, 25px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--seed);
}

.page-contact .co-dir-tag {
  display: inline-block;
  font-size: 12px;
  line-height: 1.5;
}

.page-contact .co-dir-for {
  margin: 0 0 12px;
  padding-left: 12px;
  border-left: 2px solid var(--skin-light);
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--skin);
}

.page-contact .co-dir-text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
}

.page-contact .co-dir-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 14.5px;
}

.page-contact .co-dir-list li {
  position: relative;
  padding-left: 17px;
  line-height: 1.7;
}

.page-contact .co-dir-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--kiwi-flesh);
  border-radius: 50%;
}

@media (hover: hover) {
  .page-contact .co-dir:hover {
    transform: translateX(5px);
    border-left-color: var(--kiwi-glow);
  }
}

/* ---------- 投稿要求 ---------- */
.page-contact .co-brief-panel {
  padding: clamp(18px, 2.6vw, 30px);
  background: var(--pale-green);
  border-left: 6px solid var(--kiwi-core);
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
}

.page-contact .co-brief-grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

@media (min-width: 760px) {
  .page-contact .co-brief-grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }
}

.page-contact .co-brief-media {
  margin: 0;
  aspect-ratio: 5 / 4;
  overflow: hidden;
  background: var(--paper-light);
}

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

.page-contact .co-brief-list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-contact .co-brief-item {
  padding: 13px 0;
  border-bottom: 1px dashed rgba(62, 142, 42, 0.42);
}

.page-contact .co-brief-item:first-child {
  padding-top: 0;
}

.page-contact .co-brief-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .co-brief-item dt {
  margin-bottom: 3px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--kiwi-core);
}

.page-contact .co-brief-item dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
}

@media (min-width: 560px) {
  .page-contact .co-brief-item {
    display: grid;
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }

  .page-contact .co-brief-item dt {
    margin-bottom: 0;
    padding-top: 4px;
  }
}

/* ---------- 合作成果 ---------- */
.page-contact .co-result-list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-contact .co-result-item {
  position: relative;
  padding: 16px 0 16px 24px;
  border-bottom: 1px solid rgba(107, 74, 43, 0.22);
}

.page-contact .co-result-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .co-result-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 24px;
  width: 10px;
  height: 10px;
  background: var(--print-orange);
  transform: rotate(45deg);
}

.page-contact .co-result-item dt {
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 800;
  color: var(--seed);
}

.page-contact .co-result-item dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  opacity: 0.86;
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq {
  display: grid;
  gap: 0;
}

.page-contact .co-faq-item {
  border-bottom: 1px solid rgba(107, 74, 43, 0.25);
}

.page-contact .co-faq-item summary {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--seed);
  transition: color var(--dur) ease;
}

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

.page-contact .co-faq-item summary::marker {
  content: "";
}

.page-contact .co-faq-item summary::before {
  content: "+";
  flex: 0 0 auto;
  width: 18px;
  font-family: var(--font-num);
  font-size: 17px;
  line-height: 1.42;
  text-align: center;
  color: var(--kiwi-core);
}

.page-contact .co-faq-item[open] > summary {
  color: var(--kiwi-core);
}

.page-contact .co-faq-item[open] > summary::before {
  content: "\2212";
  color: var(--print-orange);
}

.page-contact .co-faq-item p {
  margin: 0 0 16px 30px;
  font-size: 14.5px;
  line-height: 1.82;
  opacity: 0.86;
}

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

/* ---------- 右侧粘性轨道 ---------- */
.page-contact .co-rail-sticky {
  display: grid;
  gap: 18px;
}

@media (min-width: 1000px) {
  .page-contact .co-rail-sticky {
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    scrollbar-width: thin;
  }
}

.page-contact .co-rail-title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px dashed rgba(107, 74, 43, 0.34);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--seed);
}

.page-contact .co-flow {
  padding: 24px 22px 22px;
  background: var(--paper-light);
  border-top: 5px solid var(--kiwi-flesh);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-contact .co-flow-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .co-flow-list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 16px;
  bottom: 18px;
  width: 2px;
  background: repeating-linear-gradient(180deg, var(--skin-light) 0 5px, transparent 5px 11px);
}

.page-contact .co-flow-step {
  position: relative;
  padding: 0 0 18px 34px;
}

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

.page-contact .co-flow-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  box-sizing: border-box;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--paper-light);
  border: 3px solid var(--kiwi-flesh);
}

.page-contact .co-flow-step:first-child::before,
.page-contact .co-flow-step:last-child::before {
  background: var(--kiwi-glow);
  border-color: var(--seed);
}

.page-contact .co-flow-no {
  display: block;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--skin);
}

.page-contact .co-flow-step h3 {
  margin: 2px 0 4px;
  font-size: 15.5px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--seed);
}

.page-contact .co-flow-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.68;
  opacity: 0.78;
}

.page-contact .co-contact {
  position: relative;
  padding: 24px 22px 22px;
  background-color: var(--seed);
  background-image:
    radial-gradient(circle at 90% 12%, rgba(200, 255, 61, 0.16) 0 42px, transparent 43px),
    radial-gradient(circle at 90% 12%, rgba(107, 191, 58, 0.22) 0 88px, transparent 89px);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-contact .co-contact .co-rail-title {
  color: var(--paper-light);
  border-bottom-color: rgba(200, 255, 61, 0.34);
}

.page-contact .co-contact-list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-contact .co-contact-row {
  padding: 11px 0;
  border-bottom: 1px solid rgba(245, 240, 225, 0.14);
}

.page-contact .co-contact-row:first-child {
  border-top: 1px solid rgba(245, 240, 225, 0.14);
}

.page-contact .co-contact-label {
  margin: 0 0 3px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--kiwi-glow);
}

.page-contact .co-contact-value {
  margin: 0;
  font-family: var(--font-num);
  font-size: 14px;
  line-height: 1.55;
  color: var(--paper-light);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .co-contact-value--text {
  font-family: var(--font-body);
  font-size: 14px;
}

.page-contact .co-contact-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: rgba(245, 240, 225, 0.78);
}

/* ---------- 收尾行动面板 ---------- */
.page-contact .co-cta-wrap {
  padding: 0 0 clamp(42px, 6vw, 74px);
}

.page-contact .co-cta {
  display: grid;
  gap: 22px;
  padding: clamp(26px, 4vw, 46px) clamp(20px, 4vw, 46px);
  background-color: var(--skin);
  background-image:
    radial-gradient(circle at 90% 22%, rgba(200, 255, 61, 0.24) 0 58px, transparent 59px),
    radial-gradient(circle at 90% 22%, rgba(107, 191, 58, 0.3) 0 122px, transparent 123px);
  color: var(--paper-light);
  clip-path: polygon(0 0, calc(100% - 44px) 0, 100% 44px, 100% 100%, 44px 100%, 0 calc(100% - 44px));
}

@media (min-width: 820px) {
  .page-contact .co-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 38px;
  }
}

.page-contact .co-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--paper-light);
}

.page-contact .co-cta p {
  margin: 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 240, 225, 0.84);
  overflow-wrap: anywhere;
}

.page-contact .co-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.page-contact .co-cta-link {
  color: var(--kiwi-glow);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid rgba(200, 255, 61, 0.42);
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.page-contact .co-cta-link:hover {
  color: var(--paper-light);
  border-bottom-color: var(--paper-light);
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 640px) {
  .page-contact .display-skew {
    transform: none;
  }

  .page-contact .co-hero-media {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  }

  .page-contact .co-cta {
    clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
  }

  .page-contact .co-brief-panel,
  .page-contact .co-flow {
    clip-path: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-dir,
  .page-contact .co-faq-item summary,
  .page-contact .co-cta-link {
    transition: none;
  }

  .page-contact .co-dir:hover {
    transform: none;
  }
}