.page-contact {
  --co-panel-w: 320px;
  --co-gap: 32px;
}

.page-contact .co-hero {
  display: grid;
  gap: 28px;
  padding-block: 28px 48px;
  border-bottom: 1px solid var(--line);
}

.page-contact .co-hero__title {
  margin-top: 14px;
  font-size: clamp(32px, 5.6vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--fog);
  max-width: 18ch;
}

.page-contact .co-hero__lead {
  margin-top: 20px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-contact .co-hero__media {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 32px));
  border: 1px solid var(--line);
}

.page-contact .co-hero__media img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .co-head {
  display: grid;
  gap: 12px;
  max-width: 68ch;
  margin-bottom: 32px;
}

.page-contact .co-head h2 {
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-contact .co-head p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .co-split {
  display: grid;
  gap: var(--co-gap);
  align-items: start;
}

/* 联系信息面板 */
.page-contact .co-panel {
  position: relative;
  padding: 24px 22px 22px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(180deg, rgba(25, 27, 58, 0.94) 0%, rgba(7, 21, 39, 0.96) 100%);
}

.page-contact .co-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--lime) 0%, rgba(198, 255, 62, 0) 78%);
}

.page-contact .co-panel__title {
  margin-top: 12px;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-contact .co-panel__note {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .co-panel__list {
  margin: 20px 0 0;
  display: grid;
  gap: 14px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-contact .co-panel__row {
  display: grid;
  gap: 4px;
}

.page-contact .co-panel__row dt {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-contact .co-panel__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--fog);
}

.page-contact .co-panel__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  font-size: 14.5px;
  letter-spacing: 0.01em;
  color: var(--fog);
  word-break: break-all;
  user-select: all;
}

.page-contact .co-panel__value--text {
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.65;
  word-break: normal;
}

.page-contact .co-panel__hint {
  font-size: 12px;
  color: var(--slate);
}

.page-contact .co-panel__foot {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* 四类合作 */
.page-contact .co-track {
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color 220ms var(--ease), background-color 220ms var(--ease);
}

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

.page-contact .co-track:hover,
.page-contact .co-track[open] {
  border-color: var(--line-strong);
  background: var(--panel-hover);
}

.page-contact .co-track__head {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 14px;
  padding: 16px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .co-track__no {
  display: grid;
  place-items: center;
  height: 40px;
  font-size: 14px;
  color: var(--ink);
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 12px 100%);
  transition: background-color 220ms var(--ease);
}

.page-contact .co-track--data .co-track__no {
  background: var(--lime);
}

.page-contact .co-track--content .co-track__no {
  background: var(--mint);
}

.page-contact .co-track--brand .co-track__no {
  background: var(--amber);
}

.page-contact .co-track--fix .co-track__no {
  background: var(--slate);
}

.page-contact .co-track__heading {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.page-contact .co-track__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--fog);
  letter-spacing: -0.01em;
}

.page-contact .co-track__fit {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--slate);
}

.page-contact .co-track__chev {
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--mint);
  border-bottom: 1px solid var(--mint);
  transform: rotate(45deg);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
  justify-self: end;
}

.page-contact .co-track[open] .co-track__chev {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-contact .co-track__body {
  display: grid;
  gap: 16px;
  padding: 16px 16px 20px;
  border-top: 1px solid var(--line);
}

.page-contact .co-track__col {
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-contact .co-track__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mint);
}

.page-contact .co-track__col p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--fog);
}

.page-contact .co-track__col a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 227, 212, 0.4);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .co-track__col a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* 四步流程 */
.page-contact .co-steps {
  position: relative;
  overflow: hidden;
  background: var(--moss);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .co-steps__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  pointer-events: none;
}

.page-contact .co-steps > .wrap {
  position: relative;
  z-index: 1;
}

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

.page-contact .co-step {
  position: relative;
  padding: 30px 8px 18px 0;
  border-top: 1px solid var(--line);
}

.page-contact .co-step__dot {
  position: absolute;
  top: 0;
  left: 0;
  width: 13px;
  height: 13px;
  margin-top: -7px;
  background: var(--ink);
  border: 1px solid var(--lime);
  transform: rotate(45deg);
  transition: background-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-contact .co-step:hover .co-step__dot {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 62, 0.16);
}

.page-contact .co-step__no {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-contact .co-step h3 {
  margin-top: 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--fog);
  letter-spacing: -0.01em;
}

.page-contact .co-step p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .co-step__time {
  display: inline-block;
  margin-top: 14px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
  border: 1px solid rgba(245, 184, 65, 0.36);
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-contact .co-step:hover .co-step__time {
  background: rgba(245, 184, 65, 0.14);
  border-color: var(--amber);
}

/* 材料清单 */
.page-contact .co-mat-grid {
  display: grid;
  gap: 14px;
}

.page-contact .co-mat {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 20px 18px;
  transition: border-color 220ms var(--ease);
}

.page-contact .co-mat:hover {
  border-color: var(--line-strong);
}

.page-contact .co-mat h3 {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  font-weight: 500;
  color: var(--mint);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-contact .co-mat ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .co-mat li {
  border: 1px solid var(--line);
  padding: 6px 10px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--fog);
  background: rgba(7, 21, 39, 0.55);
}

/* 响应与跟进 */
.page-contact .co-response {
  background:
    linear-gradient(135deg, var(--wine) 0%, var(--indigo) 42%, var(--ink) 100%);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.page-contact .co-response__grid {
  display: grid;
  gap: 32px;
}

.page-contact .co-response h2 {
  margin-top: 12px;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-contact .co-response__lead {
  margin-top: 16px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
  opacity: 0.9;
}

.page-contact .co-response__link {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .co-response__link a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 227, 212, 0.4);
  transition: color 180ms var(--ease), border-bottom-color 180ms var(--ease);
}

.page-contact .co-response__link a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-contact .co-response__side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .co-fast {
  position: relative;
  padding: 20px 18px;
  border: 1px solid rgba(198, 255, 62, 0.42);
  background: rgba(7, 21, 39, 0.6);
}

.page-contact .co-fast--ghost {
  border-color: var(--line-strong);
  background: rgba(7, 21, 39, 0.34);
}

.page-contact .co-fast__tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin-bottom: 10px;
}

.page-contact .co-fast h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--fog);
  letter-spacing: -0.01em;
}

.page-contact .co-fast p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-contact .co-mat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .co-track__head {
    grid-template-columns: 56px minmax(0, 1fr) 14px;
    gap: 18px;
    padding: 20px 22px;
  }

  .page-contact .co-track__no {
    height: 44px;
    font-size: 15px;
  }

  .page-contact .co-track__body {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    padding: 20px 22px 24px;
  }

  .page-contact .co-track__name {
    font-size: 18px;
  }
}

@media (min-width: 900px) {
  .page-contact .co-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 48px;
    padding-block: 44px 64px;
  }

  .page-contact .co-hero__lead {
    font-size: 17px;
  }

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

  .page-contact .co-steps__list::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--line-strong) 0%, rgba(198, 255, 62, 0.55) 50%, var(--line-strong) 100%);
  }

  .page-contact .co-step {
    border-top: 0;
    padding: 28px 20px 4px 0;
  }

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

  .page-contact .co-response__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-contact .co-split {
    grid-template-columns: minmax(260px, var(--co-panel-w)) minmax(0, 1fr);
    gap: 48px;
  }

  .page-contact .co-panel {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}
<<<END>>>