.page-contact {
  --c-body: #BFCBD6;
  --c-body-strong: #C3CFDA;
  --c-hover: #121922;
  display: block;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 34px) 0 clamp(44px, 6vw, 88px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(36, 48, 61, 0.72) 1px, transparent 1px);
  background-size: clamp(80px, 9vw, 132px) 100%;
  opacity: 0.4;
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: -180px;
  right: -180px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(53, 240, 138, 0.16), transparent 68%);
  pointer-events: none;
}

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

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  margin-top: clamp(22px, 3vw, 40px);
}

.page-contact h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(32px, 5.2vw, 58px);
  line-height: 1.03;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .contact-hero__lede {
  margin: 0 0 clamp(24px, 3vw, 34px);
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--c-body-strong);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .contact-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 42px) 0 0;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero__facts > div {
  background: var(--ink);
  padding: 16px 12px;
}

.page-contact .contact-hero__facts dt {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
}

.page-contact .contact-hero__facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.3vw, 26px);
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .contact-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

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

/* ---------- 章节骨架 ---------- */

.page-contact .contact-section {
  position: relative;
  padding: clamp(44px, 6.4vw, 92px) 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-section .section-head {
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

.page-contact .contact-section__lede {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-contact .contact-section__lede a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 182, 255, 0.35);
}

.page-contact .contact-section__lede a:hover {
  border-bottom-color: var(--blue);
}

/* ---------- 合作方向 ---------- */

.page-contact .tracks-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-contact .tracks-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-contact .tracks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .track {
  background: var(--panel);
  padding: clamp(20px, 2.6vw, 30px);
  transition: background-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-contact .track:hover {
  background: var(--c-hover);
  box-shadow: inset 0 0 0 1px rgba(53, 240, 138, 0.45);
}

.page-contact .track__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.13em;
  color: var(--green);
}

.page-contact .track__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--paper);
}

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

/* ---------- 四步流程 ---------- */

.page-contact .routes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .route {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-contact .route:hover,
.page-contact .route:focus-within {
  transform: translateY(-2px);
  border-color: var(--green);
  background: var(--c-hover);
}

.page-contact .route__index {
  display: inline-block;
  margin-bottom: 14px;
  padding: 2px 8px;
  background: var(--green);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.page-contact .route__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .route__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-body);
}

/* ---------- 响应与服务 ---------- */

.page-contact .contact-section--band {
  background: linear-gradient(180deg, rgba(16, 21, 28, 0.92), rgba(7, 9, 12, 1));
}

.page-contact .response-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .response-band__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink);
}

.page-contact .response-band__value {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--amber);
}

.page-contact .response-band__label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-body);
}

.page-contact .response-note {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--blue);
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--steel);
}

.page-contact .response-note a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 182, 255, 0.35);
}

.page-contact .response-note a:hover {
  border-bottom-color: var(--blue);
}

/* ---------- 联系信息 ---------- */

.page-contact .contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-contact .contact-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(22px, 2.8vw, 32px);
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-contact .contact-card:hover {
  border-color: rgba(53, 240, 138, 0.5);
  background: var(--c-hover);
}

.page-contact .contact-card--primary {
  background: linear-gradient(158deg, rgba(53, 240, 138, 0.1), rgba(16, 21, 28, 1) 60%);
  border-color: rgba(53, 240, 138, 0.34);
}

.page-contact .contact-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.page-contact .contact-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.55;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .contact-card__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-body);
}

.page-contact .contact-card .copy-btn {
  align-self: flex-start;
  margin-top: 2px;
}

.page-contact .contact-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: clamp(20px, 2.8vw, 30px) 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--steel);
}

.page-contact .contact-meta a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 182, 255, 0.35);
}

.page-contact .contact-meta a:hover {
  border-bottom-color: var(--blue);
}

.page-contact .contact-meta__sep {
  color: var(--line);
}

/* ---------- 常见问题 ---------- */

.page-contact .qa-list {
  border-bottom: 1px solid var(--line);
}

.page-contact .qa {
  border-top: 1px solid var(--line);
}

.page-contact .qa__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease);
}

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

.page-contact .qa:hover .qa__q,
.page-contact .qa[open] .qa__q {
  color: var(--green);
}

.page-contact .qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border: 1px solid var(--steel);
  transition: border-color 0.2s var(--ease);
}

.page-contact .qa__mark::before,
.page-contact .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--steel);
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .qa__mark::before {
  left: 3px;
  right: 3px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-contact .qa__mark::after {
  top: 3px;
  bottom: 3px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-contact .qa[open] .qa__mark {
  border-color: var(--green);
}

.page-contact .qa[open] .qa__mark::before {
  background: var(--green);
}

.page-contact .qa[open] .qa__mark::after {
  transform: translateX(-50%) scaleY(0);
}

.page-contact .qa__body {
  max-width: 72ch;
  padding: 0 0 20px;
}

.page-contact .qa__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-contact .qa__body a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 182, 255, 0.35);
}

.page-contact .qa__body a:hover {
  border-bottom-color: var(--blue);
}

/* ---------- 焦点反馈 ---------- */

.page-contact a:focus-visible,
.page-contact button:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

/* ---------- 平板与桌面 ---------- */

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

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

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 7fr 5fr;
  }

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

  .page-contact .contact-grid {
    grid-template-columns: 1.15fr 1fr 1.1fr;
    align-items: stretch;
  }
}

@media (min-width: 980px) {
  .page-contact .tracks-layout {
    grid-template-columns: 4fr 8fr;
  }
}

@media (min-width: 1040px) {
  .page-contact .routes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .track,
  .page-contact .route,
  .page-contact .contact-card,
  .page-contact .qa__q,
  .page-contact .qa__mark,
  .page-contact .qa__mark::before,
  .page-contact .qa__mark::after {
    transition: none;
  }

  .page-contact .route:hover,
  .page-contact .route:focus-within {
    transform: none;
  }
}
<<<END>>>