.page-contact {
  --pc-accent: var(--ry-cyan);
  --pc-pad: clamp(20px, 3vw, 28px);
}

/* ---------- hero ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: calc(var(--ry-header-h) + 40px) 0 16px;
  background:
    radial-gradient(680px 320px at 88% -12%, rgba(79, 227, 208, 0.13), transparent 70%),
    radial-gradient(520px 280px at 0% 8%, rgba(255, 122, 92, 0.07), transparent 72%);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-contact h1 {
  margin: 14px 0 0;
  font-size: clamp(40px, 9vw, 78px);
  line-height: 1;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--ry-text);
}

.page-contact .contact-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(230, 234, 246, 0.86);
}

.page-contact .hero-facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--ry-line);
  display: grid;
  gap: 10px;
}

.page-contact .hero-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.page-contact .hero-facts__k {
  font-family: var(--ry-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ry-muted);
}

.page-contact .hero-facts__v {
  font-size: 14px;
  font-weight: 600;
  color: var(--ry-cyan);
  text-align: right;
}

/* ---------- 通用标题 ---------- */
.page-contact h2 {
  margin: 12px 0 0;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--ry-text);
}

/* ---------- 渠道卡片 ---------- */
.page-contact .channels {
  padding: 30px 0 8px;
}

.page-contact .channels__head {
  max-width: 62ch;
}

.page-contact .channels__intro {
  margin: 12px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ry-muted);
}

.page-contact .channels__grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-contact .ch-card {
  position: relative;
  overflow: hidden;
  padding: var(--pc-pad);
  border: 1px solid var(--ry-line);
  border-left: 3px solid var(--pc-accent);
  border-radius: var(--ry-radius);
  background: linear-gradient(155deg, rgba(22, 28, 58, 0.92), rgba(11, 16, 38, 0.96));
  transition: transform 0.32s var(--ry-ease), box-shadow 0.32s var(--ry-ease),
    border-color 0.32s var(--ry-ease);
}

.page-contact .ch-card--cyan { --pc-accent: var(--ry-cyan); }
.page-contact .ch-card--coral { --pc-accent: var(--ry-coral); }
.page-contact .ch-card--gold { --pc-accent: var(--ry-gold); }

.page-contact .ch-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--pc-accent), transparent 72%);
  opacity: 0.85;
}

.page-contact .ch-card::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -110px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--pc-accent), transparent 68%);
  opacity: 0;
  transition: opacity 0.4s var(--ry-ease);
  pointer-events: none;
}

.page-contact .ch-card:hover,
.page-contact .ch-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--pc-accent);
  box-shadow: inset 4px 0 0 var(--pc-accent), 0 26px 48px -32px rgba(5, 7, 15, 0.95);
}

.page-contact .ch-card:hover::after,
.page-contact .ch-card:focus-within::after {
  opacity: 0.16;
}

.page-contact .ch-card__title {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ry-muted);
}

.page-contact .ch-card__value {
  margin: 8px 0 0;
  font-family: var(--ry-font-mono);
  font-size: clamp(17px, 2.1vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--ry-text);
  overflow-wrap: anywhere;
}

.page-contact .ch-card__value--addr {
  font-size: clamp(16px, 1.9vw, 19px);
}

.page-contact .ch-card__desc {
  margin: 16px 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ry-muted);
}

/* ---------- 反馈通道位置 ---------- */
.page-contact .locate {
  padding: 54px 0 8px;
}

.page-contact .locate__lead {
  margin: 14px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ry-muted);
}

.page-contact .locate__list {
  list-style: none;
  margin: 20px 0 26px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .locate__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ry-text);
}

.page-contact .locate__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--ry-coral);
}

.page-contact .locate__figure {
  margin: 26px 0 0;
  border-radius: var(--ry-radius);
  overflow: hidden;
}

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

/* ---------- 提交前准备 ---------- */
.page-contact .prep {
  padding: 52px 0 8px;
}

.page-contact .prep__lead {
  margin: 12px 0 0;
  max-width: 50ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ry-muted);
}

.page-contact .prep-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .prep-item {
  padding: 22px 20px;
  border: 1px solid var(--ry-line);
  border-radius: var(--ry-radius-sm);
  background: rgba(22, 28, 58, 0.55);
}

.page-contact .prep-item__num {
  font-family: var(--ry-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ry-cyan);
}

.page-contact .prep-item__title {
  margin: 8px 0 0;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ry-text);
}

.page-contact .prep-item__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ry-muted);
}

/* ---------- 回复时效 ---------- */
.page-contact .reply {
  padding: 52px 0 8px;
}

.page-contact .reply__lead {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ry-muted);
}

.page-contact .timeline {
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--ry-line);
  display: grid;
  gap: 24px;
}

.page-contact .timeline__item {
  position: relative;
}

.page-contact .timeline__item::before {
  content: "";
  position: absolute;
  left: -26.5px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ry-cyan);
  box-shadow: 0 0 0 4px rgba(79, 227, 208, 0.14);
}

.page-contact .timeline__k {
  margin: 0;
  font-family: var(--ry-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--ry-cyan);
}

.page-contact .timeline__v {
  margin: 6px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ry-text);
}

/* ---------- 处理流程 ---------- */
.page-contact .flow {
  padding: 52px 0 8px;
}

.page-contact .flow__lead {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ry-muted);
}

.page-contact .flow__steps {
  margin-top: 26px;
}

.page-contact .flow-step {
  border: 1px solid var(--ry-line);
  border-radius: var(--ry-radius-sm);
  background: rgba(22, 28, 58, 0.5);
  transition: border-color 0.3s var(--ry-ease), background 0.3s var(--ry-ease);
}

.page-contact .flow-step + .flow-step {
  margin-top: 12px;
}

.page-contact .flow-step[open] {
  border-color: rgba(79, 227, 208, 0.42);
  background: rgba(22, 28, 58, 0.8);
}

.page-contact .flow-step > summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  color: var(--ry-text);
}

.page-contact .flow-step > summary::-webkit-details-marker {
  display: none;
}

.page-contact .flow-step > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ry-font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--ry-cyan);
}

.page-contact .flow-step[open] > summary::after {
  content: "–";
}

.page-contact .flow-step > summary:focus-visible {
  outline: 2px solid var(--ry-cyan);
  outline-offset: 2px;
  border-radius: var(--ry-radius-sm);
}

.page-contact .flow-step__num {
  font-family: var(--ry-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ry-cyan);
}

.page-contact .flow-step__body {
  padding: 0 18px 18px;
}

.page-contact .flow-step__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ry-muted);
}

.page-contact .flow-step__body a {
  color: var(--ry-cyan);
}

.page-contact .flow__figure {
  margin: 24px 0 0;
  border-radius: var(--ry-radius);
  overflow: hidden;
}

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

/* ---------- 结尾 ---------- */
.page-contact .contact-tail {
  padding: 54px 0 64px;
}

.page-contact .contact-tail__panel {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--ry-line);
  border-radius: var(--ry-radius);
  background:
    radial-gradient(520px 220px at 100% 0%, rgba(79, 227, 208, 0.14), transparent 70%),
    linear-gradient(160deg, rgba(22, 28, 58, 0.95), rgba(5, 7, 15, 0.92));
}

.page-contact .contact-tail__text {
  margin: 12px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ry-muted);
}

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

.page-contact .contact-tail__actions .btn {
  justify-content: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 860px) {
  .page-contact .channels__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

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

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

  .page-contact .prep-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .contact-tail__panel {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 36px;
  }

  .page-contact .contact-tail__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding: calc(var(--ry-header-h) + 56px) 0 24px;
  }

  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
    gap: 56px;
  }

  .page-contact .reply__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .timeline {
    margin-top: 4px;
  }
}

@media (min-width: 960px) {
  .page-contact .locate__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 44px;
    align-items: center;
  }

  .page-contact .locate__figure {
    margin: 0;
  }
}

@media (min-width: 1000px) {
  .page-contact .flow__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .flow__steps {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ch-card,
  .page-contact .ch-card::after {
    transition: none;
  }

  .page-contact .ch-card:hover,
  .page-contact .ch-card:focus-within {
    transform: none;
  }
}