.page-contact {
  background: var(--c-ink);
  color: var(--c-paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(44px, 6vw, 84px);
  background:
    radial-gradient(120% 90% at 12% -10%, rgba(255, 106, 26, 0.16) 0%, transparent 55%),
    radial-gradient(90% 80% at 92% 6%, rgba(47, 243, 224, 0.13) 0%, transparent 60%),
    var(--c-void);
  border-bottom: var(--line);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 74, 112, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 74, 112, 0.55) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.35;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse at 72% 18%, #000 8%, transparent 70%);
  mask-image: radial-gradient(ellipse at 72% 18%, #000 8%, transparent 70%);
}

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

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-mist);
  margin-bottom: clamp(20px, 3vw, 38px);
}

.page-contact .breadcrumb a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-contact h1 {
  margin: 12px 0 0;
  font-size: clamp(2.1rem, 6.4vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 800;
  color: var(--c-paper);
}

.page-contact .contact-hero__main .lead {
  margin-top: clamp(14px, 2vw, 22px);
  max-width: 34ch;
  color: var(--c-mist);
}

.page-contact .direct {
  margin-top: clamp(24px, 3.5vw, 40px);
  border-top: var(--line);
}

.page-contact .direct__row {
  display: block;
  padding: 14px 0 16px;
  border-bottom: var(--line);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s var(--ease);
}

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

.page-contact .direct__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
  margin-bottom: 6px;
}

.page-contact .direct__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3.4vw, 1.55rem);
  line-height: 1.3;
  color: var(--c-paper);
  overflow-wrap: anywhere;
  transition: color 0.25s var(--ease);
}

.page-contact .direct__row:hover .direct__value,
.page-contact .direct__row:focus-visible .direct__value {
  color: var(--c-cyan);
}

.page-contact .signal {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--c-mist);
}

.page-contact .contact-hero__aside {
  display: grid;
  gap: 16px;
}

.page-contact .contact-hero__figure {
  margin: 0;
  border-color: rgba(47, 243, 224, 0.35);
}

.page-contact .hero-route {
  padding: clamp(16px, 2.4vw, 22px);
}

.page-contact .hero-route__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .hero-route__list li + li {
  border-top: var(--line);
}

.page-contact .hero-route__list a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 14px;
  padding: 11px 0;
  text-decoration: none;
  color: var(--c-paper);
  font-size: 0.95rem;
  transition: color 0.25s var(--ease);
}

.page-contact .hero-route__list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

.page-contact .hero-route__list a:hover,
.page-contact .hero-route__list a:focus-visible {
  color: var(--c-cyan);
}

/* ---------- 通道 ---------- */
.page-contact .channels {
  margin-top: clamp(20px, 3vw, 34px);
  border-top: var(--line-strong);
}

.page-contact .channels__row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 10px;
  padding: 18px 0;
  border-bottom: var(--line);
}

.page-contact .channels__num {
  grid-column: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
  padding-top: 5px;
}

.page-contact .channels__main {
  grid-column: 2;
}

.page-contact .channels__name {
  margin: 0 0 5px;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-contact .channels__scope {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-contact .channels__time {
  grid-column: 2;
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-ember);
}

/* ---------- 咨询准备 ---------- */
.page-contact .prep {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(20px, 3vw, 32px);
  align-items: start;
}

.page-contact .prep__item {
  border-bottom: var(--line);
}

.page-contact .prep__item summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-paper);
  transition: color 0.25s var(--ease);
}

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

.page-contact .prep__item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--c-mist);
}

.page-contact .prep__item[open] summary {
  color: var(--c-cyan);
}

.page-contact .prep__item[open] summary::after {
  content: "—";
  color: var(--c-cyan);
}

.page-contact .prep__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-orange);
}

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

.page-contact .prep__body p {
  margin: 0 0 10px;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-contact .prep__body ul {
  margin: 0;
  padding-left: 18px;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-contact .prep__body li::marker {
  color: var(--c-steel);
}

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

/* ---------- 合作 ---------- */
.page-contact .contact-coop {
  border-top: var(--line);
}

.page-contact .coop {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-contact .coop__list {
  list-style: none;
  margin: clamp(18px, 2.5vw, 26px) 0 0;
  padding: 0;
  border-top: var(--line);
}

.page-contact .coop__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  padding: 14px 0;
  border-bottom: var(--line);
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-contact .coop__list p {
  margin: 0;
}

.page-contact .coop__list strong {
  color: var(--c-cyan);
  font-weight: 600;
  margin-right: 2px;
}

.page-contact .coop__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-orange);
  padding-top: 3px;
}

.page-contact .coop__panel {
  padding: clamp(20px, 3vw, 30px);
}

.page-contact .coop__cta {
  margin-top: 18px;
  display: inline-block;
}

/* ---------- 响应时段（暖白信息岛） ---------- */
.page-contact .contact-window {
  color: var(--c-ink);
}

.page-contact .window {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
}

.page-contact .window__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(8, 20, 38, 0.62);
}

.page-contact .window__time {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 5.4vw, 2.7rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .window__sub {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0;
  font-size: 0.88rem;
  color: rgba(8, 20, 38, 0.72);
}

.page-contact .window__sub .status-dot {
  background: var(--c-ink);
  box-shadow: none;
}

.page-contact .window__body h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3.4vw, 2.05rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--c-ink);
}

.page-contact .window__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid rgba(8, 20, 38, 0.2);
  display: grid;
  gap: 10px;
}

.page-contact .window__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  font-size: 0.93rem;
  line-height: 1.7;
  color: rgba(8, 20, 38, 0.76);
}

.page-contact .window__list span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #b8430f;
}

.page-contact .window__note {
  margin: 18px 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(8, 20, 38, 0.72);
}

.page-contact .window__links {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(8, 20, 38, 0.72);
}

.page-contact .window__links a {
  color: #0b3f6b;
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 63, 107, 0.45);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-contact .window__links a:hover,
.page-contact .window__links a:focus-visible {
  color: #b8430f;
  border-bottom-color: #b8430f;
}

/* ---------- 地址 ---------- */
.page-contact .contact-address {
  border-top: var(--line);
}

.page-contact .mailblock {
  position: relative;
  margin-top: clamp(18px, 3vw, 30px);
  padding: clamp(20px, 4vw, 44px);
  border: var(--line-strong);
  background: linear-gradient(135deg, rgba(23, 58, 99, 0.55) 0%, rgba(8, 20, 38, 0.94) 100%);
}

.page-contact .mailblock::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--c-cyan), transparent);
}

.page-contact .mailblock__addr {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.8vw, 1.35rem);
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: var(--c-paper);
  overflow-wrap: anywhere;
}

.page-contact .mailblock__note {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 帮助中心跳转 ---------- */
.page-contact .help-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: clamp(20px, 4vw, 40px);
  border: var(--line-strong);
  border-left: 3px solid var(--c-orange);
  background: var(--c-panel);
}

.page-contact .help-cta__text h2 {
  margin: 8px 0 0;
  font-size: clamp(1.3rem, 3.4vw, 1.95rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-contact .help-cta__text p {
  margin: 10px 0 0;
  max-width: 52ch;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-contact .help-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .window__list li {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 14px;
  }
}

@media (min-width: 820px) {
  .page-contact .channels__row {
    grid-template-columns: 56px minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: clamp(16px, 2.5vw, 32px);
    padding: 24px 0;
    align-items: start;
  }

  .page-contact .channels__time {
    grid-column: 3;
    text-align: right;
    margin-top: 6px;
  }

  .page-contact .help-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(24px, 4vw, 48px);
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-contact .prep {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-contact .coop {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-contact .window {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .direct__row,
  .page-contact .direct__value,
  .page-contact .hero-route__list a,
  .page-contact .prep__item summary,
  .page-contact .window__links a,
  .page-contact .breadcrumb a {
    transition: none;
  }
}