.page-contact {
  --co-line: rgba(242, 234, 217, .16);
  --co-line-strong: rgba(242, 234, 217, .34);
  --co-shadow: 8px 8px 0 rgba(75, 240, 176, .14);
  background: var(--ink);
  color: var(--cream);
  overflow-x: hidden;
}

.page-contact a {
  color: var(--neon);
}

/* ---------- 面包屑 ---------- */
.page-contact .co-crumb {
  padding-block: clamp(14px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-deep);
  border-bottom: 3px solid var(--cream);
}

.page-contact .co-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .38;
  pointer-events: none;
}

.page-contact .co-hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(48px, 8vw, 104px);
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  max-width: min(960px, 100%);
}

.page-contact .co-hero__inner .eyebrow {
  justify-self: start;
  color: var(--neon-mist);
  border-color: var(--neon);
}

.page-contact h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 6vw, 72px);
  line-height: 1.02;
  letter-spacing: -.015em;
  margin: 0;
  color: var(--cream);
  max-width: 20ch;
}

.page-contact .co-hero__lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .co-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin-top: 8px;
}

.page-contact .co-hero__meta span {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--neon-mist);
  border: 1px solid var(--co-line-strong);
  padding: 7px 11px;
  background: rgba(20, 35, 29, .6);
}

/* ---------- 合作方向 ---------- */
.page-contact .co-directions {
  padding-block: clamp(44px, 6.5vw, 84px);
  background: var(--ink);
}

.page-contact .co-directions .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 20px;
  border-bottom: 2px solid var(--co-line-strong);
  padding-bottom: 14px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .co-directions h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-contact .co-directions .label-index {
  color: var(--mist);
}

.page-contact .co-dir-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-contact .co-dir {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 11px;
  padding: clamp(20px, 2.4vw, 26px) clamp(18px, 2.2vw, 24px);
  background: var(--turf);
  border: 2px solid var(--co-line);
  box-shadow: var(--co-shadow);
  transition: border-color .18s var(--ease), transform .18s var(--ease), background .18s var(--ease);
}

.page-contact .co-dir::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--mist);
  transition: background .18s var(--ease);
}

.page-contact .co-dir:hover,
.page-contact .co-dir:focus-within {
  border-color: var(--neon);
  background: #172A22;
  transform: translate(-3px, -3px);
}

.page-contact .co-dir:hover::before,
.page-contact .co-dir:focus-within::before {
  background: var(--neon);
}

.page-contact .co-dir__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-contact .co-dir__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.25;
  color: var(--cream);
}

.page-contact .co-dir__fit {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--neon-mist);
  border-left: 2px solid var(--neon);
  padding-left: 10px;
}

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

.page-contact .co-dir__list {
  list-style: none;
  margin: 4px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--co-line-strong);
  display: grid;
  gap: 8px;
}

.page-contact .co-dir__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--cream);
}

.page-contact .co-dir__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 7px;
  height: 2px;
  background: var(--amber);
}

/* ---------- 对接流程 ---------- */
.page-contact .co-flow {
  padding-block: clamp(46px, 7vw, 88px);
  background: var(--turf);
  border-top: 3px solid var(--co-line-strong);
  border-bottom: 3px solid var(--co-line-strong);
}

.page-contact .co-flow .section-head {
  border-bottom: 2px solid var(--co-line-strong);
  padding-bottom: 14px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .co-flow h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-contact .co-flow .label-index {
  color: var(--mist);
  margin: 8px 0 0;
}

.page-contact .co-flow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 38px);
}

.page-contact .co-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
}

.page-contact .co-step {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: clamp(12px, 2vw, 20px);
  padding: clamp(18px, 2.4vw, 26px);
  background: rgba(8, 12, 11, .55);
  border: 2px solid var(--co-line);
  border-left: 4px solid var(--neon);
}

.page-contact .co-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: calc(clamp(18px, 2.4vw, 26px) + 28px);
  bottom: calc(-1 * clamp(16px, 2.2vw, 24px));
  width: 2px;
  height: clamp(16px, 2.2vw, 24px);
  background: linear-gradient(180deg, var(--neon), var(--amber));
}

.page-contact .co-step__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 600;
  line-height: 1;
  color: var(--neon);
  text-align: center;
  padding-top: 2px;
}

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

.page-contact .co-step__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 1.9vw, 22px);
  color: var(--cream);
}

.page-contact .co-step__body > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .co-step__more {
  margin-top: 14px;
  padding-top: 11px;
  border-top: 1px dashed var(--co-line-strong);
}

.page-contact .co-step__more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--neon-mist);
  transition: color .16s var(--ease);
}

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

.page-contact .co-step__more summary::before {
  content: "+ ";
  color: var(--neon);
  font-weight: 700;
}

.page-contact .co-step__more[open] summary::before {
  content: "− ";
}

.page-contact .co-step__more summary:hover {
  color: var(--neon);
}

.page-contact .co-step__more ul {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-contact .co-step__more li {
  position: relative;
  padding-left: 15px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--cream);
}

.page-contact .co-step__more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 6px;
  border: 1.5px solid var(--amber);
  transform: rotate(45deg);
}

.page-contact .co-flow__figure {
  margin: 0;
  border: 3px solid var(--cream);
  box-shadow: var(--co-shadow);
  background: var(--ink-deep);
}

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

.page-contact .co-flow__figure .figure-caption {
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  border-top: 2px solid var(--co-line-strong);
}

.page-contact .co-flow__note {
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .co-flow__note a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应节奏 ---------- */
.page-contact .co-cadence {
  background: var(--ink-deep);
  border-top: 3px solid var(--amber);
  border-bottom: 2px solid var(--co-line);
}

.page-contact .co-cadence__inner {
  padding-block: clamp(36px, 5vw, 64px);
}

.page-contact .co-cadence h2 {
  margin: 0 0 clamp(18px, 2.4vw, 28px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 34px);
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-contact .co-cadence__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.2vw, 24px);
}

.page-contact .co-cadence__item {
  padding: 18px 0 0;
  border-top: 2px solid var(--co-line-strong);
}

.page-contact .co-cadence__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-contact .co-cadence__item p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 联系渠道 ---------- */
.page-contact .co-contact {
  padding-block: clamp(46px, 7vw, 88px);
  color: var(--brown);
  border-top: 3px solid var(--brown);
}

.page-contact .co-contact__head {
  margin-bottom: clamp(24px, 3.2vw, 38px);
}

.page-contact .co-contact__head .eyebrow {
  color: var(--brown);
  border-color: var(--brown);
}

.page-contact .co-contact h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--brown);
  max-width: 24ch;
}

.page-contact .co-contact__lead {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--brown);
  opacity: .8;
}

.page-contact .co-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 22px);
}

.page-contact .co-contact__item {
  padding: clamp(18px, 2.2vw, 24px);
  background: rgba(35, 24, 15, .05);
  border: 2px solid var(--brown);
  transition: background .18s var(--ease), transform .18s var(--ease);
}

.page-contact .co-contact__item:hover,
.page-contact .co-contact__item:focus-within {
  background: rgba(35, 24, 15, .12);
  transform: translate(-2px, -2px);
}

.page-contact .co-contact__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--brown);
  opacity: .65;
}

.page-contact .co-contact__value {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.6vw, 19px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--brown);
  word-break: break-word;
  user-select: all;
}

.page-contact .co-contact__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--brown);
  opacity: .78;
}

.page-contact .co-contact__hint {
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding-top: 16px;
  border-top: 2px solid var(--cream-shade);
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--brown);
}

.page-contact .co-contact__hint a {
  color: var(--brown);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.page-contact .co-contact__hint a:hover {
  color: var(--red-deep);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .co-dir-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-contact .co-contact__grid {
    grid-template-columns: 1.2fr 0.9fr 1.1fr;
  }
}

@media (min-width: 1080px) {
  .page-contact .co-dir-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .co-flow__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .co-flow__figure {
    position: sticky;
    top: 24px;
  }
}

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

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