.page-contact {
  position: relative;
  isolation: isolate;
  overflow-x: hidden;
  background: var(--abyss);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.7;
  padding-block: clamp(20px, 3vw, 40px) clamp(48px, 6vw, 88px);
}

.page-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(199, 213, 224, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 213, 224, 0.055) 1px, transparent 1px);
  background-size: 64px 64px;
}

.page-contact img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-contact .contact-shell {
  display: grid;
  gap: clamp(40px, 6vw, 80px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-contact .contact-hero__title {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 74px);
  line-height: 0.99;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-wrap: balance;
}

.page-contact .contact-hero__lede {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .contact-card {
  margin-top: clamp(24px, 3.4vw, 40px);
  padding: clamp(20px, 3vw, 34px);
  display: grid;
  background: var(--teal);
  border: 2px solid rgba(199, 213, 224, 0.32);
  box-shadow: var(--shadow-hard);
}

.page-contact .contact-card__kicker {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-contact .contact-line {
  display: grid;
  gap: 6px;
  padding-block: clamp(14px, 2vw, 20px);
  border-top: 1px solid rgba(199, 213, 224, 0.22);
}

.page-contact .contact-line:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.page-contact .contact-line__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--graphite);
}

.page-contact .contact-line__mail {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.1vw, 22px);
  letter-spacing: 0.02em;
  color: var(--cyan);
  text-decoration: none;
  overflow-wrap: anywhere;
  border-bottom: 2px solid transparent;
  transition: border-color 180ms var(--ease);
}

.page-contact .contact-line__mail:hover,
.page-contact .contact-line__mail:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-contact .contact-line__tel {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--amber);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.page-contact .contact-line__plain {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2vw, 20px);
  letter-spacing: 0.06em;
  color: var(--paper);
}

.page-contact .contact-line__hint {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

.page-contact .contact-hero__side {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
}

.page-contact .contact-hero__figure {
  margin: 0;
  border: 2px solid rgba(199, 213, 224, 0.28);
  box-shadow: var(--shadow-hard-sm);
}

.page-contact .contact-hero__figure img {
  object-fit: cover;
  width: 100%;
}

.page-contact .hero-facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  border-top: 2px solid rgba(199, 213, 224, 0.24);
}

.page-contact .hero-facts li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(199, 213, 224, 0.14);
  font-size: 14px;
  color: var(--mist);
}

.page-contact .hero-facts strong {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 通用标题 ---------- */
.page-contact .contact-h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.06;
  color: var(--paper);
  text-wrap: balance;
}

.page-contact .contact-h2--sm {
  font-size: clamp(20px, 2.6vw, 30px);
}

.page-contact .contact-sub {
  max-width: 64ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 响应安排 ---------- */
.page-contact .response-block,
.page-contact .prep-block,
.page-contact .coop-block,
.page-contact .route-block {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-contact .response-block__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  padding: clamp(20px, 3vw, 36px);
  background: var(--teal);
  border: 2px solid rgba(199, 213, 224, 0.2);
}

.page-contact .response-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

.page-contact .response-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--amber));
}

.page-contact .response-step {
  position: relative;
}

.page-contact .response-step::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--abyss);
  border: 2px solid var(--cyan);
}

.page-contact .response-step__time {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-contact .response-step__title {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .response-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.68;
  color: var(--mist);
}

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

.page-contact .response-side__figure {
  margin: 0;
  border: 2px solid rgba(199, 213, 224, 0.22);
}

.page-contact .response-side__figure img {
  width: 100%;
  object-fit: cover;
}

.page-contact .response-side__note {
  margin: 0;
  padding-left: 12px;
  border-left: 3px solid var(--indigo);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 反馈准备 ---------- */
.page-contact .prep-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .prep-item {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(16px, 2vw, 22px);
  background: var(--slate);
  border: 2px solid rgba(199, 213, 224, 0.16);
  border-left: 4px solid var(--indigo);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), border-left-color 180ms var(--ease);
}

.page-contact .prep-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-sm);
  border-left-color: var(--amber);
}

.page-contact .prep-item__num {
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(199, 213, 224, 0.18);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-contact .prep-item__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .prep-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.66;
  color: var(--mist);
}

/* ---------- 合作流程 ---------- */
.page-contact .flow {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-contact .flow-step {
  position: relative;
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(16px, 2vw, 22px);
  background: var(--teal);
  border: 2px solid rgba(199, 213, 224, 0.2);
}

.page-contact .flow-step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-contact .flow-step__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .flow-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.68;
  color: var(--mist);
}

.page-contact .notice {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
}

/* ---------- 场景分流 ---------- */
.page-contact .route-grid {
  display: grid;
  gap: 14px;
}

.page-contact .route-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--abyss);
  border: 2px solid rgba(199, 213, 224, 0.24);
  color: var(--paper);
  text-decoration: none;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-contact .route-card:hover,
.page-contact .route-card:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  box-shadow: 6px 6px 0 rgba(45, 226, 208, 0.2);
}

.page-contact .route-card .tag {
  justify-self: start;
}

.page-contact .route-card__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-contact .route-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.66;
  color: var(--mist);
}

.page-contact .route-card__more {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

/* ---------- 备案档案条 ---------- */
.page-contact .record-block {
  display: grid;
  gap: 16px;
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 2px solid rgba(199, 213, 224, 0.28);
}

.page-contact .record-strip {
  margin: 0;
  display: grid;
  gap: 16px 24px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .record-strip__item {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-contact .record-strip__item dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--graphite);
}

.page-contact .record-strip__item dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-contact .record-strip__item .record-value--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-contact .record-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 返回入口 ---------- */
.page-contact .contact-back {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: clamp(4px, 1.5vw, 12px);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-contact .prep-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .route-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-contact .record-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .record-strip__item--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 840px) {
  .page-contact .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
  }

  .page-contact .flow-step:not(:last-child)::after {
    content: "→";
    position: absolute;
    top: 24px;
    right: -20px;
    z-index: 2;
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--cyan);
  }
}

@media (min-width: 900px) {
  .page-contact .response-block__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: center;
  }
}

@media (min-width: 940px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-contact .contact-hero__side {
    position: sticky;
    top: 84px;
  }
}

@media (min-width: 1010px) {
  .page-contact .prep-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .prep-item:first-child {
    grid-column: span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .prep-item,
  .page-contact .route-card,
  .page-contact .contact-line__mail {
    transition: none;
  }

  .page-contact .prep-item:hover,
  .page-contact .route-card:hover,
  .page-contact .route-card:focus-visible {
    transform: none;
  }
}