.page-contact {
  --pc-pad: clamp(18px, 3.6vw, 30px);
  --pc-line: rgba(169, 184, 176, .24);
  background-color: var(--pitch);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
}
.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(169, 184, 176, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 184, 176, .07) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(72% 84% at 76% 26%, #000 0%, transparent 74%);
  mask-image: radial-gradient(72% 84% at 76% 26%, #000 0%, transparent 74%);
  pointer-events: none;
}
.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(228, 255, 77, .38), transparent);
}

.page-contact .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(20px, 3.4vw, 34px);
  padding: 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}
.page-contact .breadcrumb__list a {
  color: var(--mist);
  text-decoration: none;
}
.page-contact .breadcrumb__list a:hover,
.page-contact .breadcrumb__list a:focus-visible {
  color: var(--lemon);
}
.page-contact .breadcrumb__sep { color: rgba(169, 184, 176, .5); }
.page-contact .breadcrumb__list [aria-current="page"] { color: var(--lemon); }

.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(24px, 4.6vw, 46px);
  align-items: center;
}

.page-contact .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lemon);
}

.page-contact .contact-hero h1 {
  margin: 0;
  font-size: clamp(28px, 6vw, 52px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-contact .contact-hero__lead {
  margin: clamp(16px, 2.6vw, 22px) 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-contact .contact-hero__media {
  border-radius: var(--r-l);
  overflow: hidden;
  box-shadow: var(--shadow-2);
}
.page-contact .contact-hero__media .media-frame__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 双栏：联系卡 + 合作路径 ---------- */
.page-contact .contact-split {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

.page-contact .contact-card {
  background: var(--pitch-deep);
  border: 1px solid var(--pc-line);
  border-radius: var(--r-l);
  padding: var(--pc-pad);
  box-shadow: var(--shadow-1);
}
.page-contact .contact-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lemon);
}
.page-contact .contact-card__title {
  margin: 10px 0 clamp(16px, 2.4vw, 22px);
  font-size: clamp(19px, 2.6vw, 23px);
  line-height: 1.35;
  font-weight: 800;
}

.page-contact .contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-contact .contact-item {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding-block: 15px;
  border-top: 1px solid var(--pc-line);
}
.page-contact .contact-item:last-child { border-bottom: 1px solid var(--pc-line); }

.page-contact .contact-item__label {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}
.page-contact .contact-item__value {
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.6;
  color: var(--white);
  overflow-wrap: anywhere;
}
.page-contact .contact-item__value--mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  text-decoration: underline;
  text-decoration-color: var(--lemon);
  text-decoration-thickness: 3px;
  text-underline-offset: 5px;
}
.page-contact .contact-item__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 2px;
}

.page-contact .copy-btn {
  appearance: none;
  border: 1px solid rgba(228, 255, 77, .45);
  background: transparent;
  color: var(--lemon);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 6px 12px;
  border-radius: var(--r-s);
  cursor: pointer;
  transition: background-color .25s var(--ease), color .25s var(--ease);
}
.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  background: var(--lemon);
  color: var(--pitch-deep);
}

.page-contact .contact-note {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}
.page-contact .copy-note {
  margin: 8px 0 0;
  font-size: 11.5px;
  letter-spacing: .02em;
  color: rgba(169, 184, 176, .72);
}

/* ---------- 三类合作路径 ---------- */
.page-contact .contact-paths {
  display: grid;
  gap: 14px;
}
.page-contact .path-block {
  position: relative;
  background: rgba(255, 255, 255, .045);
  border: 1px solid var(--pc-line);
  border-left: 4px solid var(--mid);
  border-radius: var(--r-m);
  padding: clamp(18px, 2.6vw, 26px);
}
.page-contact .path-block--ref { border-left-color: var(--blue); }
.page-contact .path-block--topic { border-left-color: var(--lemon); }
.page-contact .path-block--youth { border-left-color: var(--amber); }

.page-contact .path-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.page-contact .path-block__title {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 800;
  line-height: 1.3;
}
.page-contact .path-block__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}
.page-contact .path-block__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}
.page-contact .path-block__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .82);
}
.page-contact .path-block__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lemon);
}

.page-contact .path-figure {
  margin: 0;
  border-radius: var(--r-m);
  overflow: hidden;
}
.page-contact .path-figure .media-frame__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 对接流程 ---------- */
.page-contact .flow-head {
  margin-bottom: clamp(22px, 3.4vw, 34px);
}
.page-contact .flow-head h2 {
  margin: 0;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.2;
  font-weight: 900;
}
.page-contact .flow-head__lead {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .contact-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-contact .flow-step {
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--pc-line);
  border-radius: var(--r-m);
  padding: clamp(18px, 2.4vw, 24px);
}
.page-contact .flow-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--lemon);
}
.page-contact .flow-step__title {
  margin: 14px 0 8px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 800;
}
.page-contact .flow-step__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 范围与节奏 ---------- */
.page-contact .scope-title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.2;
  font-weight: 900;
}
.page-contact .scope-grid {
  display: grid;
  gap: 14px;
}
.page-contact .scope-panel {
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--pc-line);
  border-radius: var(--r-m);
  padding: clamp(18px, 2.6vw, 26px);
}
.page-contact .scope-panel--dark {
  background: var(--pitch-deep);
  border-color: rgba(228, 255, 77, .18);
}
.page-contact .scope-panel__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lemon);
}
.page-contact .scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-contact .scope-list li {
  display: grid;
  grid-template-columns: minmax(52px, auto) 1fr;
  gap: 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--pc-line);
}
.page-contact .scope-list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}
.page-contact .scope-list__num {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--lemon);
  letter-spacing: .02em;
}
.page-contact .scope-list__txt {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .scope-foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 68ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .link-underline {
  color: var(--lemon);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.page-contact .link-underline:hover,
.page-contact .link-underline:focus-visible {
  color: var(--white);
}

/* ---------- 署名与备案 ---------- */
.page-contact .signoff {
  background: var(--paper);
  color: var(--pitch);
  border-radius: var(--r-l);
  padding: clamp(22px, 3.6vw, 38px);
  box-shadow: var(--shadow-2);
}
.page-contact .signoff__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mid);
}
.page-contact .signoff__title {
  margin: 10px 0 clamp(18px, 2.8vw, 26px);
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.25;
  font-weight: 900;
}
.page-contact .signoff__rows {
  margin: 0;
  display: grid;
  gap: 0;
}
.page-contact .signoff__row {
  display: grid;
  gap: 6px;
  padding-block: 15px;
  border-top: 1px solid rgba(11, 61, 46, .16);
}
.page-contact .signoff__row:last-child {
  border-bottom: 1px solid rgba(11, 61, 46, .16);
}
.page-contact .signoff__key {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mid);
}
.page-contact .signoff__val {
  margin: 0;
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.6;
  overflow-wrap: anywhere;
}
.page-contact .signoff__val--mono {
  font-family: var(--font-mono);
  letter-spacing: .05em;
}
.page-contact .signoff__foot {
  margin: clamp(18px, 2.6vw, 24px) 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--pitch);
}
.page-contact .signoff .link-underline {
  color: var(--pitch);
  text-decoration-color: var(--mid);
}
.page-contact .signoff .link-underline:hover,
.page-contact .signoff .link-underline:focus-visible {
  color: var(--mid);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-contact .contact-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .scope-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(290px, .82fr) minmax(0, 1.18fr);
  }
  .page-contact .contact-card {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
  .page-contact .contact-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 719px) {
  .page-contact .path-block__list li { font-size: 13px; }
  .page-contact .scope-list li {
    grid-template-columns: minmax(44px, auto) 1fr;
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .reveal,
  .page-contact .reveal.is-visible {
    transform: none !important;
    transition: none !important;
    opacity: 1 !important;
  }
  .page-contact .copy-btn {
    transition: none;
  }
}
</main>