.page-contact {
  --contact-gap: clamp(1rem, 2.6vw, 1.6rem);
  --contact-panel: rgba(20, 27, 58, 0.9);
  overflow-x: hidden;
}

.page-contact .page-contact__crumbs {
  padding-top: clamp(1.1rem, 3vw, 1.9rem);
}

/* ── 首屏 ─────────────────────────────── */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(1.8rem, 5.5vw, 3.4rem) 0 clamp(1.2rem, 3vw, 1.8rem);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  left: -26%;
  width: min(82vw, 720px);
  height: min(82vw, 720px);
  border-radius: 50%;
  background: radial-gradient(circle at 42% 42%, rgba(111, 75, 216, 0.34), rgba(200, 107, 255, 0.08) 46%, transparent 68%);
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 46rem;
}

.page-contact .contact-hero__title {
  margin: 1rem 0 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(2rem, 7.2vw, 4rem);
  line-height: 1.08;
  letter-spacing: 0.02em;
  color: var(--stardust);
  text-shadow: 0 0 30px rgba(111, 75, 216, 0.38), 0 0 72px rgba(53, 224, 214, 0.1);
}

.page-contact .contact-hero__lede {
  margin: 1.15rem 0 0;
  max-width: 38rem;
  font-size: clamp(1rem, 2.4vw, 1.1rem);
  line-height: 1.85;
  color: var(--grey);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

/* ── 首屏配图 ─────────────────────────── */
.page-contact .contact-visual {
  margin: clamp(1.2rem, 3.4vw, 2rem) auto 0;
  max-width: var(--shell);
  border: var(--line-soft);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: linear-gradient(140deg, rgba(20, 27, 58, 0.92), rgba(5, 7, 15, 0.7));
}

.page-contact .contact-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ── 章节骨架 ─────────────────────────── */
.page-contact .contact-section {
  position: relative;
  padding: clamp(2.4rem, 6.5vw, 4.6rem) 0;
}

.page-contact .contact-section--tight {
  padding: clamp(1.6rem, 4vw, 2.6rem) 0;
}

.page-contact .contact-head {
  max-width: 44rem;
  margin-bottom: clamp(1.4rem, 3.6vw, 2.4rem);
}

.page-contact .contact-head .section-title {
  margin: 0.65rem 0 0;
}

.page-contact .contact-head .lede {
  margin: 0.85rem 0 0;
}

/* ── 三条渠道卡片 ─────────────────────── */
.page-contact .contact-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: clamp(1.25rem, 3vw, 1.8rem) clamp(1.15rem, 2.8vw, 1.6rem);
  border: var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(155deg, rgba(20, 27, 58, 0.94), rgba(11, 16, 36, 0.88));
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  border-radius: var(--radius-l) var(--radius-l) 0 0;
  background: linear-gradient(90deg, var(--purple), rgba(111, 75, 216, 0));
}

.page-contact .channel:nth-child(2)::before {
  background: linear-gradient(90deg, var(--pulse), rgba(53, 224, 214, 0));
}

.page-contact .channel:nth-child(3)::before {
  background: linear-gradient(90deg, var(--pink), rgba(200, 107, 255, 0));
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  transform: translateY(-4px);
  border-color: rgba(111, 75, 216, 0.82);
  box-shadow: var(--glow-purple);
}

.page-contact .channel__idx {
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--grey);
}

.page-contact .channel__title {
  font-size: clamp(1.05rem, 2.6vw, 1.2rem);
  letter-spacing: 0.04em;
  color: var(--stardust);
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3vw, 1.1rem);
  line-height: 1.6;
  color: var(--stardust);
  overflow-wrap: anywhere;
}

.page-contact .channel__value--addr {
  font-family: var(--font-sans);
  font-size: clamp(0.96rem, 2.6vw, 1.05rem);
  line-height: 1.72;
  color: var(--stardust);
}

.page-contact .channel__copy {
  align-self: flex-start;
  min-height: 44px;
  border-color: rgba(255, 194, 75, 0.5);
  color: var(--amber);
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-contact .channel__copy:hover,
.page-contact .channel__copy:focus-visible {
  border-color: var(--amber);
  background: rgba(255, 194, 75, 0.14);
}

.page-contact .channel__text {
  margin: 0;
  padding-top: 0.5rem;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--grey);
}

/* ── 回复时间 ─────────────────────────── */
.page-contact .contact-reply {
  display: grid;
  gap: clamp(1.2rem, 3.2vw, 2rem);
  padding: clamp(1.3rem, 4vw, 2.4rem);
  border: var(--line-soft);
  border-radius: var(--radius-l);
  background: linear-gradient(150deg, rgba(20, 27, 58, 0.82), rgba(5, 7, 15, 0.62));
}

.page-contact .contact-reply__tip {
  position: relative;
  margin: 1.1rem 0 0;
  padding: 0.85rem 1rem;
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(255, 194, 75, 0.09);
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--stardust);
}

.page-contact .contact-facts {
  margin: 0;
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.page-contact .contact-facts__row {
  display: grid;
  gap: 0.28rem;
  padding-bottom: 0.85rem;
  border-bottom: var(--line-soft);
}

.page-contact .contact-facts__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .contact-facts__key {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.15em;
  color: var(--grey);
}

.page-contact .contact-facts__val {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.68;
  color: var(--stardust);
}

/* ── 合作方向 ─────────────────────────── */
.page-contact .contact-coop {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .coop {
  position: relative;
  padding: clamp(1.2rem, 3vw, 1.7rem);
  border: var(--line-soft);
  border-left: 2px solid rgba(111, 75, 216, 0.7);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(11, 16, 36, 0.52);
  transition: background-color 0.35s var(--ease), border-left-color 0.35s var(--ease);
}

.page-contact .coop:nth-child(2) {
  border-left-color: rgba(53, 224, 214, 0.7);
}

.page-contact .coop:nth-child(3) {
  border-left-color: rgba(200, 107, 255, 0.7);
}

.page-contact .coop:hover {
  background: rgba(20, 27, 58, 0.78);
}

.page-contact .coop__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.17em;
  color: var(--pulse);
}

.page-contact .coop__title {
  margin: 0.5rem 0 0;
  font-size: clamp(1.05rem, 2.6vw, 1.16rem);
  letter-spacing: 0.03em;
  color: var(--stardust);
}

.page-contact .coop__text {
  margin: 0.7rem 0 0;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--grey);
}

.page-contact .coop__list {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.page-contact .coop__list li {
  position: relative;
  padding-left: 1rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--grey);
}

.page-contact .coop__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--purple);
}

/* ── 到访与区域 ───────────────────────── */
.page-contact .contact-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  align-items: center;
}

.page-contact .region-cities {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.3rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .region-city {
  position: relative;
  padding: 0.46rem 0.95rem 0.46rem 1.6rem;
  border: var(--line-soft);
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--grey);
}

.page-contact .region-city::before {
  content: "";
  position: absolute;
  left: 0.76rem;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--orbit);
}

.page-contact .region-city--hot {
  border-color: rgba(53, 224, 214, 0.55);
  color: var(--stardust);
}

.page-contact .region-city--hot::before {
  background: var(--pulse);
  box-shadow: var(--glow-pulse);
  animation: contact-node-pulse 3.6s ease-in-out infinite;
}

.page-contact .contact-region__note {
  margin: 1.1rem 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--grey);
}

.page-contact .contact-region__figure {
  margin: 0;
  border: var(--line-soft);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: linear-gradient(160deg, rgba(20, 27, 58, 0.88), rgba(5, 7, 15, 0.72));
}

.page-contact .contact-region__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ── 在线反馈 ─────────────────────────── */
.page-contact .contact-feedback {
  max-width: 44rem;
  padding: clamp(1.5rem, 4.4vw, 2.5rem);
  border: var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(140deg, rgba(111, 75, 216, 0.18), rgba(53, 224, 214, 0.06) 55%, rgba(5, 7, 15, 0.62));
}

.page-contact .contact-feedback__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.3rem;
}

@keyframes contact-node-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.82); }
}

/* ── 响应式 ───────────────────────────── */
@media (min-width: 820px) {
  .page-contact .contact-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-contact .contact-reply {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-region {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
  }
}

@media (max-width: 520px) {
  .page-contact .channel__value {
    font-size: 0.94rem;
  }

  .page-contact .contact-hero__actions .btn,
  .page-contact .contact-feedback__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .region-city--hot::before {
    animation: none;
  }

  .page-contact .channel {
    transition: none;
  }
}