.page-contact {
  --co-line: rgba(201, 207, 201, .14);
  --co-line-strong: rgba(201, 207, 201, .30);
  --co-ink: #0B1A15;
  --co-body-light: #2C3A34;
  --co-pad: clamp(54px, 8vw, 108px);
  position: relative;
  background: var(--ink-950);
  color: var(--concrete-200);
  overflow-x: clip;
}

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

/* ---------- 首屏 ---------- */

.page-contact .co-hero {
  position: relative;
  padding: clamp(86px, 11vw, 130px) 0 clamp(46px, 6vw, 78px);
  isolation: isolate;
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(110% 78% at 6% 0%, rgba(47, 232, 198, .10), transparent 58%),
    radial-gradient(84% 66% at 97% 10%, rgba(255, 106, 26, .12), transparent 60%);
}

.page-contact .co-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
}

.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(20px, 3vw, 34px);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--concrete-500);
}

.page-contact .crumbs a {
  color: var(--concrete-500);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-contact .crumbs a:hover,
.page-contact .crumbs a:focus-visible {
  color: var(--neon-400);
}

.page-contact .crumbs__sep {
  color: var(--turf-700);
}

.page-contact .co-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--neon-400);
}

.page-contact .co-eyebrow__dot {
  width: 9px;
  height: 9px;
  flex: none;
  background: var(--signal-500);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 62%);
}

.page-contact .co-hero__title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.2vw, 66px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paint-050);
}

.page-contact .co-hero__lead {
  margin: 0 0 30px;
  max-width: 34em;
  font-size: clamp(16px, 1.55vw, 19px);
  line-height: 1.85;
  color: var(--concrete-200);
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: clamp(32px, 4vw, 46px);
}

.page-contact .co-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--co-line);
  border: 1px solid var(--co-line);
}

.page-contact .co-hero__fact {
  background: var(--concrete-900);
  padding: 16px 18px;
}

.page-contact .co-hero__fact dt {
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--concrete-500);
}

.page-contact .co-hero__fact dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 700;
  color: var(--signal-500);
}

.page-contact .co-hero__figure {
  position: relative;
  margin: 0;
}

.page-contact .co-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--co-line);
  filter: saturate(.88) contrast(1.06);
}

.page-contact .co-hero__figure::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 46%;
  height: 3px;
  background: var(--signal-500);
}

.page-contact .co-hero__caption {
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--concrete-500);
}

/* ---------- 通用章节 ---------- */

.page-contact .section {
  position: relative;
  padding: var(--co-pad) 0;
}

.page-contact .section--light {
  background: var(--paint-050);
  color: var(--co-ink);
}

.page-contact .chapter {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin: 0 0 clamp(24px, 3.4vw, 42px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--co-line);
}

.page-contact .chapter__num {
  flex: none;
  margin: 0;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--signal-500);
}

.page-contact .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(25px, 3.5vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--paint-050);
}

.page-contact .section--light .chapter {
  border-bottom-color: rgba(11, 26, 21, .16);
}

.page-contact .section--light .chapter__title {
  color: var(--co-ink);
}

/* ---------- 合作方向 ---------- */

.page-contact .co-directions__intro {
  margin: 0 0 clamp(24px, 3vw, 36px);
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--concrete-200);
}

.page-contact .co-directions__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-contact .co-dir {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 30px 24px 24px;
  background: var(--concrete-900);
  border: 1px solid var(--co-line);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-contact .co-dir::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 3px;
  background: var(--turf-700);
  transition: width .28s var(--ease), background-color .28s var(--ease);
}

.page-contact .co-dir:hover,
.page-contact .co-dir:focus-within {
  border-color: var(--co-line-strong);
  transform: translateY(-2px);
}

.page-contact .co-dir:hover::before,
.page-contact .co-dir:focus-within::before {
  width: 92px;
  background: var(--signal-500);
}

.page-contact .co-dir__tag {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--neon-400);
}

.page-contact .co-dir__title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paint-050);
}

.page-contact .co-dir__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--concrete-200);
}

.page-contact .co-dir__meta {
  display: grid;
  gap: 12px;
  margin: auto 0 0;
  padding-top: 18px;
  border-top: 1px dashed var(--co-line);
}

.page-contact .co-dir__meta dt {
  margin: 0 0 3px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--concrete-500);
}

.page-contact .co-dir__meta dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--concrete-200);
}

/* ---------- 流程 ---------- */

.page-contact .co-flow {
  position: relative;
  overflow: hidden;
}

.page-contact .co-flow__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-contact .co-flow__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .09;
  filter: grayscale(1);
}

.page-contact .co-flow .container {
  position: relative;
  z-index: 1;
}

.page-contact .co-flow__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(26px, 3.4vw, 40px);
}

.page-contact .co-flow__jump a {
  display: inline-block;
  padding: 7px 13px;
  border: 1px solid rgba(11, 26, 21, .2);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--co-body-light);
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}

.page-contact .co-flow__jump a:hover,
.page-contact .co-flow__jump a:focus-visible {
  border-color: var(--signal-500);
  color: var(--signal-600);
  background: rgba(255, 106, 26, .07);
}

.page-contact .co-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 52px);
}

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

.page-contact .co-step {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 36px;
}

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

.page-contact .co-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 50px;
  bottom: 22px;
  width: 1px;
  background: linear-gradient(180deg, rgba(11, 26, 21, .38), rgba(11, 26, 21, .06));
}

.page-contact .co-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 16px;
  bottom: 14px;
  width: 11px;
  height: 11px;
  border-right: 1px solid var(--signal-500);
  border-bottom: 1px solid var(--signal-500);
  transform: rotate(45deg);
  opacity: .75;
}

.page-contact .co-step__node {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  color: var(--signal-500);
  background: var(--ink-950);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 72% 100%, 0 100%);
}

.page-contact .co-step__title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--co-ink);
}

.page-contact .co-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--co-body-light);
}

.page-contact .co-step__focus {
  margin: 11px 0 0;
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--signal-600);
}

.page-contact .co-flow__aside {
  position: relative;
  padding: 28px 24px;
  background: var(--ink-950);
  border: 1px solid rgba(11, 26, 21, .34);
  overflow: hidden;
}

.page-contact .co-flow__aside::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 24px 24px 0;
  border-color: transparent var(--paint-050) transparent transparent;
}

.page-contact .co-flow__aside-title {
  margin: 0 0 18px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--neon-400);
}

.page-contact .co-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 15px;
}

.page-contact .co-check li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--concrete-200);
}

.page-contact .co-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 9px;
  height: 9px;
  background: var(--neon-400);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 62%);
}

/* ---------- 材料清单 ---------- */

.page-contact .co-materials__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--co-line);
  border: 1px solid var(--co-line);
}

.page-contact .co-mat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px 24px;
  background: var(--ink-950);
}

.page-contact .co-mat__idx {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--signal-500);
}

.page-contact .co-mat__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paint-050);
}

.page-contact .co-mat__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--concrete-200);
}

/* ---------- 联系渠道 ---------- */

.page-contact .co-channel__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 54px);
}

.page-contact .co-channel__title,
.page-contact .co-site__title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(25px, 3.5vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--paint-050);
}

.page-contact .co-channel__text,
.page-contact .co-site__text {
  margin: 0 0 18px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--concrete-200);
}

.page-contact .co-channel__text:last-child,
.page-contact .co-site__text:last-child {
  margin-bottom: 0;
}

.page-contact .co-channel__cards {
  display: grid;
  gap: 14px;
}

.page-contact .co-channel__card {
  position: relative;
  padding: 24px 22px;
  background: var(--concrete-900);
  border: 1px solid var(--co-line);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-contact .co-channel__card:hover,
.page-contact .co-channel__card:focus-within {
  border-color: rgba(47, 232, 198, .5);
  transform: translateY(-2px);
}

.page-contact .co-channel__label {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--neon-400);
}

.page-contact .co-channel__value {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: clamp(15px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paint-050);
  overflow-wrap: anywhere;
}

.page-contact .co-channel__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(201, 207, 201, .72);
}

/* ---------- 站点信息 ---------- */

.page-contact .co-site__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.page-contact .co-site__list {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--co-line);
  border: 1px solid var(--co-line);
}

.page-contact .co-site__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 20px;
  background: var(--concrete-900);
}

.page-contact .co-site__row dt {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--concrete-500);
}

.page-contact .co-site__row dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1.6;
  color: var(--paint-050);
  overflow-wrap: anywhere;
}

/* ---------- 延伸入口 ---------- */

.page-contact .co-more {
  padding: clamp(46px, 6vw, 82px) 0 clamp(56px, 7vw, 96px);
  border-top: 1px solid var(--co-line);
}

.page-contact .co-more__title {
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  font-family: var(--font-display);
  font-size: clamp(21px, 2.9vw, 30px);
  font-weight: 900;
  line-height: 1.25;
  color: var(--paint-050);
}

.page-contact .co-more__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--co-line);
  border: 1px solid var(--co-line);
}

.page-contact .co-more__links a {
  display: block;
  padding: 22px 20px;
  background: var(--ink-950);
  font-size: 15px;
  line-height: 1.6;
  color: var(--concrete-200);
  text-decoration: none;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

.page-contact .co-more__links a:hover,
.page-contact .co-more__links a:focus-visible {
  background: var(--channel-800);
  color: var(--neon-400);
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-contact .co-site__row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

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

  .page-contact .co-channel__card:first-child {
    grid-column: 1 / -1;
  }
}

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

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

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

@media (min-width: 980px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, .76fr);
    align-items: start;
  }

  .page-contact .co-hero__figure img {
    aspect-ratio: 4 / 5.4;
  }

  .page-contact .co-flow__grid {
    grid-template-columns: minmax(0, 1.72fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .co-channel__grid {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    align-items: start;
  }

  .page-contact .co-site__grid {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-contact .co-flow__aside {
    position: sticky;
    top: 108px;
  }
}

@media (min-width: 1180px) {
  .page-contact .co-materials__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-dir,
  .page-contact .co-channel__card,
  .page-contact .co-more__links a {
    transition: none;
  }

  .page-contact .co-dir:hover,
  .page-contact .co-dir:focus-within,
  .page-contact .co-channel__card:hover,
  .page-contact .co-channel__card:focus-within {
    transform: none;
  }
}