.page-contact {
  --co-panel: rgba(7, 11, 24, 0.86);
  --co-card: #0E1630;
  --co-hair: 1px solid var(--blueprint-line);
  background-color: var(--midnight-900);
  color: var(--silver);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  padding: clamp(26px, 5vw, 56px) 0 clamp(30px, 5vw, 64px);
  background-image:
    linear-gradient(to right, rgba(30, 42, 74, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 42, 74, 0.5) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px;
}

.page-contact .co-hero__inner {
  display: grid;
  gap: 30px;
}

.page-contact .co-hero__lead {
  border-left: 3px solid var(--maple-red);
  padding-left: clamp(14px, 3vw, 24px);
}

.page-contact .co-path {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--silver-dim);
}

.page-contact .co-path a {
  color: var(--maple-red-light);
  text-decoration: none;
}

.page-contact .co-path a:hover,
.page-contact .co-path a:focus-visible {
  color: var(--paper);
}

.page-contact .co-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 6vw, 50px);
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .co-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
}

.page-contact .co-hero__console {
  position: relative;
  overflow: hidden;
  min-height: 300px;
  border: var(--co-hair);
}

.page-contact .co-hero__bg {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.page-contact .co-hero__panel {
  position: relative;
  display: grid;
  gap: 14px;
  padding: clamp(16px, 3vw, 28px);
}

.page-contact .co-mailcard {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 16px 20px;
  background: var(--co-panel);
  border: var(--co-hair);
  border-top: 2px solid var(--maple-red);
}

.page-contact .co-mailcard--green {
  border-top-color: var(--aurora-green);
}

.page-contact .co-mailcard__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--maple-red-light);
}

.page-contact .co-mailcard--green .co-mailcard__label {
  color: var(--aurora-green);
}

.page-contact .co-mailcard__addr {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(12px, 3.2vw, 15px);
  letter-spacing: 0.01em;
  color: var(--paper);
  word-break: break-all;
}

.page-contact .co-mailcard__desc {
  flex: 1;
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver-dim);
}

/* ---------- 复制按钮（沿用共享 .copy-btn 的补充状态） ---------- */
.page-contact .copy-btn {
  align-self: flex-start;
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--silver);
  background: transparent;
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  color: var(--paper);
  border-color: var(--maple-red);
}

.page-contact .copy-btn.is-done {
  color: var(--aurora-green);
  border-color: var(--aurora-green);
}

/* ---------- 通用区块 ---------- */
.page-contact .co-block {
  padding: clamp(40px, 7vw, 84px) 0;
}

.page-contact .co-block--alt {
  background: linear-gradient(180deg, rgba(14, 22, 48, 0.65), rgba(7, 11, 24, 0));
}

.page-contact .co-head {
  max-width: 46em;
  margin: 0 0 clamp(24px, 4vw, 42px);
}

.page-contact .co-head__code {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--aurora-green);
}

.page-contact .co-head__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-contact .co-head__desc {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver-dim);
}

/* ---------- 合作范围 ---------- */
.page-contact .co-scope {
  display: grid;
  gap: 16px;
}

.page-contact .co-scope__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  background: var(--midnight-700);
  border: var(--co-hair);
  border-left: 2px solid var(--maple-red);
  transition: border-color 220ms var(--ease), transform 220ms var(--ease);
}

.page-contact .co-scope__item:hover,
.page-contact .co-scope__item:focus-within {
  border-left-color: var(--aurora-green);
  transform: translateY(-4px);
}

.page-contact .co-scope__item--paper {
  background: var(--paper);
  border-color: transparent;
  border-left: 2px solid var(--maple-red);
  color: var(--ink);
}

.page-contact .co-scope__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--maple-red-light);
}

.page-contact .co-scope__item--paper .co-scope__code {
  color: var(--maple-red);
}

.page-contact .co-scope__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--paper);
}

.page-contact .co-scope__item--paper .co-scope__title {
  color: var(--ink);
}

.page-contact .co-scope__fit {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--aurora-green);
}

.page-contact .co-scope__item--paper .co-scope__fit {
  color: var(--aurora-deep);
}

.page-contact .co-scope__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--silver);
}

.page-contact .co-scope__item--paper .co-scope__desc {
  color: #2B3446;
}

.page-contact .co-scope__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 300ms var(--ease), opacity 220ms var(--ease);
}

.page-contact .co-scope__more > p {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--blueprint-line);
  font-size: 14px;
  line-height: 1.74;
  color: var(--silver-dim);
}

.page-contact .co-scope__item--paper .co-scope__more > p {
  border-top-color: rgba(16, 20, 31, 0.18);
  color: #4A5568;
}

.page-contact .co-scope__item:hover .co-scope__more,
.page-contact .co-scope__item:focus-within .co-scope__more {
  max-height: 260px;
  opacity: 1;
}

/* ---------- 联系方式 ---------- */
.page-contact .co-contact {
  display: grid;
  gap: 18px;
}

.page-contact .co-contact__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px;
  background: var(--co-card);
  border: var(--co-hair);
  border-left: 3px solid var(--maple-red);
}

.page-contact .co-contact__card--green {
  border-left-color: var(--aurora-green);
}

.page-contact .co-contact__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--maple-red-light);
}

.page-contact .co-contact__card--green .co-contact__tag {
  color: var(--aurora-green);
}

.page-contact .co-contact__addr {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(13px, 3.4vw, 17px);
  color: var(--paper);
  word-break: break-all;
}

.page-contact .co-contact__body {
  flex: 1;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

.page-contact .co-contact__foot {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--silver-dim);
}

/* ---------- 电话与来访 ---------- */
.page-contact .co-visit {
  display: grid;
  gap: 30px;
}

.page-contact .co-sub {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 24px);
  color: var(--paper);
}

.page-contact .co-visit__phone {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 30px);
  letter-spacing: 0.04em;
  color: var(--aurora-green);
}

.page-contact .co-visit__body {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

.page-contact .co-addr {
  position: relative;
  margin: 0;
  padding: 12px 0 12px 22px;
  border-left: 2px solid var(--maple-red);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper);
}

.page-contact .co-addr::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -2px;
  width: 8px;
  background-image: repeating-linear-gradient(to bottom, var(--blueprint-line) 0 1px, transparent 1px 10px);
  pointer-events: none;
}

/* ---------- 合作流程 ---------- */
.page-contact .co-flow {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-flow__step {
  position: relative;
  padding: 26px 20px 26px 0;
  border-top: 2px solid var(--blueprint-line);
  transition: border-top-color 220ms var(--ease);
}

.page-contact .co-flow__step::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--midnight-900);
  border: 2px solid var(--blueprint-line);
  transform: rotate(45deg);
  transition: border-color 220ms var(--ease), background-color 220ms var(--ease);
}

.page-contact .co-flow__step:hover,
.page-contact .co-flow__step:focus-within {
  border-top-color: var(--aurora-green);
}

.page-contact .co-flow__step:hover::before,
.page-contact .co-flow__step:focus-within::before {
  border-color: var(--aurora-green);
  background: var(--aurora-green);
}

.page-contact .co-flow__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--maple-red-light);
}

.page-contact .co-flow__title {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--paper);
}

.page-contact .co-flow__you,
.page-contact .co-flow__we {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver-dim);
}

.page-contact .co-flow__we {
  margin-bottom: 0;
}

.page-contact .co-flow__role {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--silver);
  border: 1px solid var(--blueprint-line);
}

.page-contact .co-figure {
  margin: clamp(28px, 5vw, 48px) 0 0;
}

.page-contact .co-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--co-hair);
}

.page-contact .co-figure__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--silver-dim);
}

/* ---------- 尾区 ---------- */
.page-contact .co-tail {
  padding: clamp(34px, 6vw, 64px) 0 clamp(40px, 7vw, 76px);
}

.page-contact .co-tail__links {
  max-width: 44em;
  margin: 0 0 28px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--silver);
}

.page-contact .co-tail__links a {
  color: var(--maple-red-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(228, 50, 43, 0.45);
}

.page-contact .co-tail__links a:hover,
.page-contact .co-tail__links a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-contact .co-imprint {
  display: grid;
  gap: 12px;
  padding: 20px;
  background: rgba(14, 22, 48, 0.55);
  border: var(--co-hair);
}

.page-contact .co-imprint__brand {
  margin: 0;
  font-size: 14px;
  color: var(--silver);
}

.page-contact .co-imprint__icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--silver-dim);
}

.page-contact .co-imprint__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 0;
  font-size: 13px;
}

.page-contact .co-imprint__legal a {
  color: var(--silver-dim);
  text-decoration: none;
}

.page-contact .co-imprint__legal a:hover,
.page-contact .co-imprint__legal a:focus-visible {
  color: var(--aurora-green);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .co-hero__panel {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}

@media (min-width: 760px) {
  .page-contact .co-contact {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .co-imprint {
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 26px;
  }
}

@media (min-width: 780px) {
  .page-contact .co-scope {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-contact .co-scope__item:nth-child(2) {
    margin-top: 26px;
  }

  .page-contact .co-scope__item:nth-child(3) {
    margin-top: 52px;
  }

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

  .page-contact .co-flow__step {
    padding-right: 26px;
  }
}

@media (min-width: 820px) {
  .page-contact .co-visit {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }
}

@media (min-width: 920px) {
  .page-contact .co-hero__inner {
    grid-template-columns: 38fr 62fr;
    gap: 40px;
    align-items: start;
  }
}

@media (hover: none) {
  .page-contact .co-scope__more {
    max-height: 420px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-scope__item,
  .page-contact .co-scope__more,
  .page-contact .co-flow__step,
  .page-contact .co-flow__step::before,
  .page-contact .copy-btn {
    transition: none;
  }
}