.page-contact {
  --co-hair: rgba(27, 58, 90, .14);
  --co-shadow: 0 18px 40px -28px rgba(7, 21, 35, .45);
  background: var(--paper-050);
  color: var(--text-900);
}

.page-contact .contact-crumb {
  padding-top: var(--sp-4);
}

/* ---------- 首屏：先缓 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding-block: var(--sp-4) var(--sp-5);
  background:
    radial-gradient(120% 96% at 8% -10%, rgba(44, 198, 224, .18), transparent 60%),
    radial-gradient(88% 72% at 96% 4%, rgba(255, 106, 26, .18), transparent 62%),
    var(--paper-050);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: 24%;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(27, 58, 90, .14);
  border-radius: 50%;
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 860px;
}

.page-contact .contact-hero__eyebrow {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--navy-600);
}

.page-contact .contact-hero__title {
  margin: var(--sp-2) 0 0;
  font-size: clamp(2rem, 7vw, 4rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -.025em;
  max-width: 20ch;
}

.page-contact .contact-hero__accent {
  color: var(--orange-500);
}

.page-contact .contact-hero__lead {
  margin: var(--sp-3) 0 0;
  max-width: 46ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-contact .contact-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3) var(--sp-4);
  margin: var(--sp-4) 0 0;
  padding: var(--sp-3) 0 0;
  list-style: none;
  border-top: 1px solid rgba(11, 27, 43, .1);
}

.page-contact .contact-stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-contact .contact-stat__num {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--orange-500);
  line-height: 1;
}

.page-contact .contact-stat__key {
  font-size: .875rem;
  color: var(--text-muted);
}

/* ---------- 主体两栏 ---------- */

.page-contact .contact-body {
  padding-block: var(--sp-4) var(--sp-5);
}

.page-contact .contact-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

/* ---------- 左侧深色联系卡 ---------- */

.page-contact .contact-card {
  border-radius: var(--r-lg);
  background: var(--navy-800);
  color: var(--text-100);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-contact .contact-card__media {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--ink-900);
}

.page-contact .contact-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.85) contrast(1.08);
}

.page-contact .contact-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 39, 64, .1), rgba(14, 39, 64, .96));
}

.page-contact .contact-card__body {
  padding: var(--sp-3) var(--sp-3) var(--sp-4);
}

.page-contact .contact-card__eyebrow {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--mint-400);
}

.page-contact .contact-card__title {
  margin: .5rem 0 var(--sp-3);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -.015em;
  color: #fff;
}

.page-contact .contact-lines {
  margin: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-contact .contact-line {
  display: grid;
  gap: 4px;
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--navy-600);
}

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

.page-contact .contact-line__key {
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--orange-300);
}

.page-contact .contact-line__val {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.6;
  color: #fff;
  overflow-wrap: anywhere;
}

.page-contact .contact-card__note {
  margin: var(--sp-3) 0 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: rgba(233, 242, 246, .72);
}

.page-contact .contact-card__legal {
  margin: var(--sp-2) 0 0;
  font-size: .75rem;
  letter-spacing: .08em;
  color: rgba(233, 242, 246, .5);
}

/* ---------- 右侧内容流 ---------- */

.page-contact .contact-flow {
  display: grid;
  gap: var(--sp-5);
  min-width: 0;
}

.page-contact .flow-block {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-contact .flow-block__head {
  margin-bottom: var(--sp-3);
}

.page-contact .flow-block__eyebrow {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--navy-600);
}

.page-contact .flow-block__title {
  margin: .5rem 0 0;
  font-size: clamp(1.375rem, 4.4vw, 2.125rem);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -.02em;
}

.page-contact .flow-block__lead {
  margin: var(--sp-2) 0 0;
  max-width: 42ch;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 合作方向 ---------- */

.page-contact .co-figure {
  margin: 0 0 var(--sp-4);
}

.page-contact .co-figure__frame {
  aspect-ratio: 14 / 9;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--navy-800);
}

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

.page-contact .co-figure__cap {
  margin-top: var(--sp-2);
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-contact .co-dirs {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
}

.page-contact .co-dir {
  position: relative;
  padding: var(--sp-3);
  border: 1px solid var(--co-hair);
  border-radius: var(--r-md);
  background: #fff;
  transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.page-contact .co-dir:hover {
  transform: translateY(-3px);
  border-color: var(--orange-500);
  box-shadow: var(--co-shadow);
}

.page-contact .co-dir__num {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-pill);
  background: var(--ink-900);
  color: var(--orange-300);
  font-size: .8125rem;
  font-weight: 700;
}

.page-contact .co-dir__title {
  margin: var(--sp-2) 0 .5rem;
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-contact .co-dir__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-contact .co-dir__fit {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: var(--sp-2) 0 0;
  padding-top: var(--sp-2);
  border-top: 1px dashed var(--co-hair);
  font-size: .8125rem;
  color: var(--navy-600);
}

/* ---------- 合作流程 ---------- */

.page-contact .co-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-contact .co-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: start;
  padding: var(--sp-3);
  border-radius: var(--r-md);
  border: 1px solid var(--co-hair);
  border-left: 3px solid var(--navy-600);
  background: #fff;
  transition: transform .25s var(--ease), border-color .25s var(--ease), background-color .25s var(--ease);
}

.page-contact .co-step:hover {
  transform: translateY(-2px);
  border-left-color: var(--orange-500);
  background: #fff;
}

.page-contact .co-step__num {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-pill);
  background: var(--ink-900);
  border: 1px solid var(--navy-600);
  color: var(--mint-400);
  font-size: .875rem;
  font-weight: 700;
}

.page-contact .co-step__body {
  min-width: 0;
}

.page-contact .co-step__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 800;
}

.page-contact .co-step__text {
  margin: .375rem 0 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 资料清单 ---------- */

.page-contact .co-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-contact .co-checklist li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: var(--sp-2);
  align-items: start;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
  border: 1px solid var(--co-hair);
  background: #fff;
  font-size: .9375rem;
  line-height: 1.75;
}

.page-contact .co-checklist li::before {
  content: "✓";
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-top: 2px;
  border-radius: 7px;
  background: rgba(63, 217, 168, .16);
  color: var(--mint-400);
  font-size: .8125rem;
  font-weight: 700;
}

/* ---------- 专栏作者 ---------- */

.page-contact .co-author {
  position: relative;
  overflow: hidden;
  padding: var(--sp-4) var(--sp-3);
  border-radius: var(--r-lg);
  border: 1px solid var(--navy-600);
  background: linear-gradient(135deg, var(--navy-800) 0%, var(--ink-900) 100%);
  color: var(--text-100);
}

.page-contact .co-author::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 92, 255, .38), transparent 70%);
  pointer-events: none;
}

.page-contact .co-author > * {
  position: relative;
  z-index: 1;
}

.page-contact .co-author__eyebrow {
  color: var(--violet-500);
}

.page-contact .co-author__title {
  margin: .5rem 0 0;
  font-size: clamp(1.375rem, 4.4vw, 2rem);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -.02em;
  color: #fff;
}

.page-contact .co-author__lead {
  margin: var(--sp-2) 0 0;
  max-width: 44ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: rgba(233, 242, 246, .82);
}

.page-contact .co-author__list {
  list-style: none;
  margin: var(--sp-3) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .co-author__list li {
  position: relative;
  padding-left: 20px;
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(233, 242, 246, .92);
}

.page-contact .co-author__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--violet-500);
}

.page-contact .co-author__note {
  margin: var(--sp-3) 0 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--mint-400);
}

.page-contact .co-author__note .u-mono {
  font-weight: 700;
}

/* ---------- 响应时间 ---------- */

.page-contact .co-resp {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-2);
}

.page-contact .co-resp__item {
  padding: var(--sp-3);
  border-radius: var(--r-md);
  border: 1px solid var(--co-hair);
  border-top: 3px solid var(--electric-400);
  background: var(--paper-100);
}

.page-contact .co-resp__item:nth-child(2) {
  border-top-color: var(--orange-500);
}

.page-contact .co-resp__item:nth-child(3) {
  border-top-color: var(--mint-400);
}

.page-contact .co-resp__key {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--navy-600);
}

.page-contact .co-resp__text {
  margin: .5rem 0 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--text-900);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .co-dirs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 1024px) {
  .page-contact .contact-body__grid {
    grid-template-columns: minmax(288px, 340px) minmax(0, 1fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-contact .contact-aside {
    position: sticky;
    top: 104px;
  }

  .page-contact .contact-hero {
    padding-block: var(--sp-5) var(--sp-5);
  }

  .page-contact .co-dirs {
    gap: var(--sp-3);
  }
}

@media (max-width: 479px) {
  .page-contact .contact-hero__stats {
    gap: var(--sp-2);
  }

  .page-contact .contact-stat {
    flex-wrap: wrap;
    gap: 6px;
  }

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

  .page-contact .co-step__num {
    width: 38px;
    height: 38px;
  }
}