/* ========== 商务合作页 ========== */

.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 64px;
  color: var(--paper-50);
  background:
    radial-gradient(120% 90% at 88% 4%, rgba(44, 107, 78, .58) 0%, rgba(12, 26, 34, 0) 58%),
    linear-gradient(165deg, #0C1A22 0%, #132B33 52%, #0C1A22 100%);
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(245, 242, 233, .055) 0 1px, transparent 1px 96px);
  pointer-events: none;
}

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

.page-contact .co-hero .breadcrumb {
  margin-bottom: 34px;
  font-size: 13px;
  letter-spacing: .02em;
  color: rgba(245, 242, 233, .62);
}

.page-contact .co-hero .breadcrumb a {
  color: rgba(245, 242, 233, .82);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-contact .co-hero .breadcrumb a:hover {
  color: var(--volt-400);
}

.page-contact .co-hero .breadcrumb-sep {
  margin: 0 9px;
  color: rgba(245, 242, 233, .38);
}

.page-contact .co-hero-grid {
  display: grid;
  gap: 40px;
}

.page-contact .co-hero .eyebrow {
  color: var(--volt-400);
}

.page-contact .co-hero h1 {
  margin: 14px 0 22px;
  font-size: clamp(34px, 7vw, 66px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper-50);
}

.page-contact .co-hero-lede {
  max-width: 54ch;
  margin: 0 0 30px;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(245, 242, 233, .8);
}

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

.page-contact .co-hero-side {
  padding: 22px 20px;
  border: 1px solid rgba(245, 242, 233, .16);
  background: rgba(23, 44, 56, .62);
}

.page-contact .co-side-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--volt-400);
}

.page-contact .co-side-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-side-list li + li {
  border-top: 1px solid rgba(245, 242, 233, .12);
}

.page-contact .co-side-list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px 0;
  font-size: 15px;
  color: var(--paper-50);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-contact .co-side-list a:hover {
  color: var(--volt-400);
}

.page-contact .co-side-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--rock-500);
  transition: color .2s var(--ease);
}

.page-contact .co-side-list a:hover .co-side-num {
  color: var(--clay-200);
}

.page-contact .co-side-tag {
  padding: 2px 8px;
  border: 1px solid rgba(127, 169, 143, .42);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--court-300);
  white-space: nowrap;
}

.page-contact .co-side-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(245, 242, 233, .12);
  font-size: 13px;
  line-height: 1.75;
  color: rgba(245, 242, 233, .56);
}

/* ---------- 四种合作方式 ---------- */

.page-contact .co-modes {
  padding-top: 76px;
  padding-bottom: 76px;
}

.page-contact .co-modes-grid {
  display: grid;
  gap: 40px;
}

.page-contact .co-intro {
  max-width: 46ch;
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--rock-500);
}

.page-contact .co-mode-list {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-300);
}

.page-contact .co-mode {
  display: grid;
  grid-template-columns: 4px minmax(0, 1fr);
  gap: 0 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-300);
}

.page-contact .co-mode-bar {
  display: block;
  width: 4px;
  align-self: stretch;
  background: var(--rock-500);
  transition: background .25s var(--ease);
}

.page-contact .co-mode:hover .co-mode-bar {
  background: var(--clay-500);
}

.page-contact .co-mode-title {
  position: relative;
  display: inline-block;
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text-900);
}

.page-contact .co-mode-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--court-600);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .32s var(--ease);
}

.page-contact .co-mode:hover .co-mode-title::after {
  transform: scaleX(1);
}

.page-contact .co-mode-desc {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-900);
}

.page-contact .co-mode-more {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--rock-500);
}

.page-contact .co-mode-tag {
  justify-self: start;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: nowrap;
}

.page-contact .co-modes-figure {
  margin: 0;
}

.page-contact .co-shot {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-300);
  background: var(--paper-200);
  box-shadow: var(--shadow-1);
}

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

.page-contact .co-modes-caption {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--court-300);
  font-size: 13px;
  line-height: 1.75;
  color: var(--rock-500);
}

/* ---------- 四步流程 ---------- */

.page-contact .co-flow {
  position: relative;
  overflow: hidden;
  margin-top: 12px;
  padding: 76px 0 88px;
  color: var(--paper-50);
  background: var(--ink-900);
}

.page-contact .co-flow-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-contact .co-flow-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
}

.page-contact .co-flow::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(12, 26, 34, .95) 0%, rgba(12, 26, 34, .84) 46%, rgba(12, 26, 34, .97) 100%);
  pointer-events: none;
}

.page-contact .co-flow-inner {
  position: relative;
  z-index: 2;
}

.page-contact .co-flow .eyebrow {
  color: var(--volt-400);
}

.page-contact .co-flow .display-lg {
  color: var(--paper-50);
}

.page-contact .co-flow-lede {
  max-width: 48ch;
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(245, 242, 233, .68);
}

.page-contact .co-steps {
  position: relative;
  display: grid;
  gap: 22px;
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-step {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid rgba(245, 242, 233, .14);
  background: rgba(23, 44, 56, .72);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-contact .co-step:hover {
  border-color: var(--volt-400);
  background: rgba(23, 44, 56, .94);
}

.page-contact .co-step-num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 36px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--volt-400);
}

.page-contact .co-step h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--paper-50);
}

.page-contact .co-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 242, 233, .72);
}

.page-contact .co-step-time {
  display: inline-block;
  margin-top: 14px;
  padding-top: 8px;
  border-top: 1px solid rgba(232, 168, 124, .38);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--clay-200);
}

/* ---------- 准备清单与联系 ---------- */

.page-contact .co-prep {
  padding: 72px 0 80px;
  background: var(--paper-200);
}

.page-contact .co-prep-grid {
  display: grid;
  gap: 36px;
}

.page-contact .co-check {
  display: grid;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-check li {
  position: relative;
}

.page-contact .co-check input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .co-check label {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 14px 16px;
  border: 1px solid var(--line-300);
  background: var(--paper-50);
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-contact .co-check label:hover {
  border-color: var(--court-300);
  box-shadow: var(--shadow-1);
}

.page-contact .co-check label::before {
  content: "";
  grid-column: 1;
  grid-row: 1 / span 2;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  border: 1px solid var(--rock-500);
  transition: background .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-contact .co-check strong {
  grid-column: 2;
  font-size: 16px;
  font-weight: 800;
  color: var(--text-900);
}

.page-contact .co-check span {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock-500);
}

.page-contact .co-check input:checked + label {
  border-color: var(--court-600);
  background: #FFFFFF;
}

.page-contact .co-check input:checked + label::before {
  border-color: var(--court-600);
  background: var(--court-600);
  box-shadow: inset 0 0 0 4px #FFFFFF;
}

.page-contact .co-check input:focus-visible + label {
  outline: 2px solid var(--court-600);
  outline-offset: 2px;
}

.page-contact .co-contact-card {
  position: relative;
  padding: 32px 24px 28px;
  border: 1px solid var(--ink-700);
  background: var(--ink-900);
  color: var(--paper-50);
}

.page-contact .co-contact-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background: var(--volt-400);
}

.page-contact .co-contact-card .eyebrow {
  color: var(--volt-400);
}

.page-contact .co-contact-card h2 {
  margin: 12px 0 22px;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.25;
  color: var(--paper-50);
}

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

.page-contact .co-contact-list li {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-top: 1px solid rgba(245, 242, 233, .14);
}

.page-contact .co-contact-list li:last-child {
  border-bottom: 1px solid rgba(245, 242, 233, .14);
}

.page-contact .co-contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--court-300);
}

.page-contact .co-contact-value {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper-50);
  word-break: break-word;
}

.page-contact .co-contact-note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(245, 242, 233, .62);
}

.page-contact .co-contact-card .btn {
  margin-top: 22px;
}

/* ---------- 常见疑问 ---------- */

.page-contact .co-faq {
  padding-top: 76px;
  padding-bottom: 84px;
}

.page-contact .co-faq-grid {
  display: grid;
  gap: 30px;
}

.page-contact .co-faq-head .co-intro {
  max-width: 34ch;
}

.page-contact .co-q {
  border-bottom: 1px solid var(--line-300);
}

.page-contact .co-q summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
  padding: 20px 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--text-900);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .co-q summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--court-600);
}

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

.page-contact .co-q summary:hover {
  color: var(--court-600);
}

.page-contact .co-q p {
  margin: 0 0 22px;
  padding-left: 16px;
  border-left: 2px solid var(--court-300);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-900);
}

/* ---------- 延伸入口 ---------- */

.page-contact .co-links {
  padding: 56px 0 68px;
  border-top: 1px solid var(--line-300);
  background: var(--paper-50);
}

.page-contact .co-link-grid {
  display: grid;
  gap: 2px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-300);
}

.page-contact .co-link-grid li {
  border-bottom: 1px solid var(--line-300);
}

.page-contact .co-link-grid a {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  text-decoration: none;
  transition: padding-left .25s var(--ease);
}

.page-contact .co-link-grid a:hover {
  padding-left: 10px;
}

.page-contact .co-link-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-900);
  transition: color .2s var(--ease);
}

.page-contact .co-link-grid a:hover .co-link-title {
  color: var(--clay-700);
}

.page-contact .co-link-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--rock-500);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .co-mode {
    grid-template-columns: 4px minmax(0, 1fr) 172px;
    align-items: start;
  }

  .page-contact .co-mode-tag {
    justify-self: end;
    margin-top: 4px;
  }

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

  .page-contact .co-link-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }
}

@media (min-width: 960px) {
  .page-contact .co-hero {
    padding: 30px 0 84px;
  }

  .page-contact .co-hero-grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(300px, .88fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .co-hero-side {
    margin-top: 8px;
  }

  .page-contact .co-modes-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, .85fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .co-modes-figure {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-contact .co-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    padding-top: 16px;
  }

  .page-contact .co-steps::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(
      to bottom right,
      transparent calc(50% - 1px),
      rgba(198, 240, 75, .26) calc(50% - 1px),
      rgba(198, 240, 75, .26) 50%,
      transparent 50%
    );
    pointer-events: none;
  }

  .page-contact .co-step:nth-child(2) {
    margin-top: 54px;
  }

  .page-contact .co-step:nth-child(3) {
    margin-top: 108px;
  }

  .page-contact .co-step:nth-child(4) {
    margin-top: 162px;
  }

  .page-contact .co-prep-grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(330px, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .co-contact-card {
    padding: 36px 30px 32px;
  }

  .page-contact .co-faq-grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.4fr);
    gap: 60px;
    align-items: start;
  }

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

@media (min-width: 900px) and (hover: hover) {
  .page-contact .co-mode-more {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height .32s var(--ease), opacity .3s var(--ease), margin-top .32s var(--ease);
  }

  .page-contact .co-mode:hover .co-mode-more,
  .page-contact .co-mode:focus-within .co-mode-more {
    max-height: 180px;
    margin-top: 10px;
    opacity: 1;
  }
}
<<<END>>>