.page-contact {
  --pc-pad: 22px;
  background: var(--ink-950);
  color: var(--white);
  overflow-x: clip;
}

.page-contact .container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pc-pad);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: calc(var(--header-h) + 46px) 0 58px;
  background:
    radial-gradient(1120px 520px at 84% -12%, rgba(21, 94, 134, .38), transparent 62%),
    radial-gradient(680px 460px at 4% 112%, rgba(213, 43, 30, .16), transparent 62%),
    var(--ink-950);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero .breadcrumb {
  font-size: 14px;
  color: var(--ice);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-contact .contact-hero .breadcrumb__item {
  color: var(--ice);
}

.page-contact .contact-hero .breadcrumb__sep {
  color: var(--ink-600);
}

.page-contact .hero-grid {
  display: grid;
  gap: 34px;
  margin-top: 26px;
}

.page-contact .hero-title,
.page-contact h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.16;
  font-size: clamp(34px, 5.6vw, 60px);
  margin: 14px 0 0;
  color: var(--white);
  max-width: 20ch;
}

.page-contact .hero-copy .lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ice);
}

.page-contact .hero-marks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.page-contact .hero-mark {
  display: grid;
  gap: 4px;
  padding: 14px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(11, 60, 93, .32);
}

.page-contact .hero-mark__value {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.15;
  color: var(--gold);
}

.page-contact .hero-mark__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ice);
}

/* ---------- 主体骨架 ---------- */
.page-contact .contact-body {
  display: grid;
  gap: 46px;
  padding-block: 56px 0;
}

.page-contact .contact-section + .contact-section {
  margin-top: 12px;
}

.page-contact .contact-section .section__title {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: .02em;
  font-size: clamp(26px, 4.2vw, 38px);
  line-height: 1.24;
  margin: 12px 0 0;
  color: var(--white);
}

.page-contact .contact-section .section__lead {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ice);
}

.page-contact .contact-media {
  margin: 30px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-800), var(--ink-950) 72%);
}

.page-contact .contact-media .media__frame,
.page-contact .contact-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .contact-media .media__caption {
  padding: 14px 20px 18px;
  font-size: 13px;
  color: var(--ice);
}

.page-contact .contact-media--narrow {
  max-width: 640px;
}

/* ---------- 三种合作方向 ---------- */
.page-contact .direction-blocks {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-contact .dir-block {
  display: grid;
  gap: 9px;
  width: 100%;
  text-align: left;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, var(--ink-800), var(--ink-900) 74%);
  color: var(--white);
  font-family: var(--font-sans);
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.page-contact .dir-block:hover {
  transform: translateY(-2px);
  border-color: var(--ink-600);
}

.page-contact .dir-block:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-contact .dir-block.is-active {
  border-color: var(--red);
  box-shadow: 0 0 0 1px rgba(213, 43, 30, .55), var(--shadow-card);
}

.page-contact .dir-block__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-contact .dir-block__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.42;
  color: var(--white);
}

.page-contact .dir-block__note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ice);
}

.page-contact .dir-block--embed {
  background: linear-gradient(158deg, rgba(11, 60, 93, .78), rgba(8, 23, 38, .96) 78%);
}

.page-contact .direction-panels {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.page-contact .direction-panels [data-filter-item].is-hidden {
  display: none;
}

.page-contact .direction-panel {
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(10, 32, 54, .72);
}

.page-contact .direction-panel h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 22px;
  color: var(--white);
}

.page-contact .direction-panel p {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ice);
}

.page-contact .direction-panel__list {
  margin: 16px 0 0;
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
}

.page-contact .direction-panel__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--white);
}

.page-contact .direction-panel__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
}

/* ---------- 推进流程 ---------- */
.page-contact .process-track {
  position: relative;
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.page-contact .process-track::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 22px;
  bottom: 24px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--red), var(--ink-600) 46%, rgba(21, 94, 134, .12));
}

.page-contact .process-step {
  position: relative;
  padding: 0 0 30px 62px;
}

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

.page-contact .process-step__node {
  position: absolute;
  left: 0;
  top: 0;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--ink-600);
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
}

.page-contact .process-step__title {
  margin: 4px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  color: var(--white);
}

.page-contact .process-step__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--ice);
}

.page-contact .process-step__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .3s ease, opacity .22s ease, margin-top .3s ease;
}

.page-contact .process-step__more p {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--ink-600);
  font-size: 14px;
  line-height: 1.76;
  color: var(--ice);
}

/* ---------- 交付内容 ---------- */
.page-contact .support-grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-contact .support-item {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(168deg, rgba(11, 60, 93, .55), rgba(8, 23, 38, .92) 76%);
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-contact .support-item h3 {
  margin: 4px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--white);
}

.page-contact .support-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ice);
}

.page-contact .support-item--wide {
  border-color: rgba(242, 183, 5, .3);
  background: linear-gradient(160deg, rgba(11, 60, 93, .82), rgba(8, 23, 38, .96) 78%);
}

/* ---------- 留言说明 ---------- */
.page-contact .message-panel {
  margin-top: 30px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(178deg, rgba(11, 60, 93, .58), rgba(8, 23, 38, .92) 82%);
  display: grid;
  gap: 0;
}

.page-contact .message-field {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}

.page-contact .message-field:first-child {
  padding-top: 0;
}

.page-contact .message-field:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .message-field__label {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 17px;
  color: var(--white);
}

.page-contact .message-field__hint {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ice);
}

/* ---------- 右侧常驻联系卡 ---------- */
.page-contact .sticky-contact {
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(172deg, var(--ink-800), var(--ink-950) 84%);
  box-shadow: var(--shadow-card);
}

.page-contact .sticky-contact__tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(242, 183, 5, .14);
  border: 1px solid rgba(242, 183, 5, .42);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-contact .sticky-contact__title {
  margin: 16px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.3;
  color: var(--white);
}

.page-contact .sticky-contact__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ice);
}

.page-contact .sticky-contact__list {
  margin: 22px 0 0;
  display: grid;
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .sticky-contact__row {
  display: grid;
  gap: 4px;
}

.page-contact .sticky-contact__row dt {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ice);
}

.page-contact .sticky-contact__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--gold);
  word-break: break-word;
}

.page-contact .sticky-contact__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ice);
}

.page-contact .sticky-contact__cta {
  display: inline-block;
  margin-top: 18px;
}

/* ---------- 底部联系方式 ---------- */
.page-contact .contact-channels {
  margin-top: 68px;
}

.page-contact .contact-channels .section__title {
  color: var(--graphite);
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: .02em;
  font-size: clamp(26px, 4.2vw, 38px);
  line-height: 1.24;
  margin: 12px 0 0;
}

.page-contact .contact-channels .section__lead {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: #3B4750;
}

.page-contact .contact-channels .eyebrow {
  color: var(--red-dark);
}

.page-contact .channel-list {
  margin-top: 30px;
  border-top: 1px solid var(--cement-deep);
}

.page-contact .channel {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--cement-deep);
}

.page-contact .channel__label {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 17px;
  color: var(--graphite);
}

.page-contact .channel__value {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--red-dark);
  word-break: break-word;
}

.page-contact .channel__note {
  font-size: 14px;
  line-height: 1.74;
  color: #46525B;
  max-width: 60ch;
}

.page-contact .response-strip {
  margin-top: 34px;
  display: grid;
  gap: 18px;
  padding: 24px 22px;
  border-radius: var(--radius-lg);
  background: var(--ink-900);
  color: var(--white);
}

.page-contact .response-item {
  display: grid;
  gap: 6px;
}

.page-contact .response-item__value {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 20px;
  line-height: 1.2;
  color: var(--gold);
}

.page-contact .response-item__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ice);
}

.page-contact .channels-foot {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #46525B;
}

.page-contact .channels-foot a {
  color: var(--red-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .channels-foot a:hover {
  color: var(--graphite);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-contact {
    --pc-pad: 32px;
  }

  .page-contact .direction-blocks {
    grid-template-columns: 7fr 5fr;
    gap: 18px;
  }

  .page-contact .dir-block--license {
    grid-column: 1 / -1;
    padding: 30px 28px;
  }

  .page-contact .dir-block--cobuild {
    grid-column: 1 / 2;
  }

  .page-contact .dir-block--embed {
    grid-column: 2 / 3;
  }

  .page-contact .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .support-item--wide {
    padding: 28px 26px;
  }

  .page-contact .message-panel {
    padding: 30px 28px;
  }

  .page-contact .channel {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 6px 28px;
    align-items: baseline;
  }

  .page-contact .channel__label {
    grid-row: span 2;
  }

  .page-contact .channel__note {
    grid-column: 2 / 3;
  }

  .page-contact .response-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    padding: 28px 26px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding: calc(var(--header-h) + 56px) 0 72px;
  }

  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(230px, .55fr);
    gap: 60px;
    align-items: end;
    margin-top: 32px;
  }

  .page-contact .hero-marks {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .page-contact .hero-mark {
    padding: 0 0 0 16px;
    background: none;
    border: 0;
    border-left: 3px solid var(--red);
    border-radius: 0;
  }

  .page-contact .contact-body {
    grid-template-columns: minmax(0, 1fr) 318px;
    gap: 62px;
    padding-block: 72px 0;
  }

  .page-contact .contact-body__aside {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-contact .contact-channels {
    margin-top: 84px;
  }

  .page-contact .contact-media {
    margin-top: 36px;
  }
}

/* ---------- 悬停展开流程细节 ---------- */
@media (hover: hover) {
  .page-contact .process-step__more {
    max-height: 0;
    margin-top: 0;
  }

  .page-contact .process-step:hover .process-step__more,
  .page-contact .process-step:focus-within .process-step__more {
    max-height: 220px;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (hover: none) {
  .page-contact .process-step__more {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .dir-block,
  .page-contact .process-step__more {
    transition: none;
  }

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