.page-contact {
  --contact-muted: rgba(245, 243, 247, 0.72);
  --contact-panel-glass: rgba(22, 20, 31, 0.66);
  padding-bottom: clamp(36px, 7vw, 84px);
}

/* 面包屑上下文 */
.page-contact .breadcrumbs {
  padding-top: clamp(10px, 2vw, 20px);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--purple-2);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-contact .breadcrumb-link {
  color: var(--purple-2);
  text-decoration: none;
  transition: color var(--speed) var(--ease);
}

.page-contact .breadcrumb-link:hover,
.page-contact .breadcrumb-link:focus-visible {
  color: var(--ice);
}

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

/* 首屏 */
.page-contact .contact-hero {
  padding-top: clamp(18px, 3vw, 34px);
}

.page-contact .contact-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-contact .contact-hero-main .display-1 {
  margin: clamp(10px, 1.6vw, 16px) 0 clamp(14px, 2vw, 20px);
}

.page-contact .contact-hero-main .lede {
  max-width: 62ch;
}

.page-contact .eyebrow {
  color: var(--purple-2);
  margin: 0;
}

.page-contact .mail-block {
  position: relative;
  margin-top: clamp(22px, 3.4vw, 36px);
  padding: clamp(20px, 2.8vw, 32px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--purple);
  border-radius: var(--radius-card);
  background-color: var(--panel);
  background-image: radial-gradient(120% 90% at 100% 0%, rgba(124, 59, 255, 0.22), transparent 62%);
}

.page-contact .mail-label {
  margin: 0 0 12px;
  color: var(--purple-2);
}

.page-contact .mail-address {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.02rem, 2.5vw, 1.8rem);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-contact .mail-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-contact .copy-hint {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--purple-2);
  max-width: 34ch;
}

.page-contact .hero-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--panel);
}

.page-contact .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-contact .hero-figure .media-caption {
  margin: 0;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--purple-2);
  border-top: 1px solid var(--line);
  background: rgba(11, 10, 16, 0.72);
}

/* 章节标题的呼吸 */
.page-contact .section-head {
  position: relative;
  margin-bottom: clamp(10px, 1.6vw, 18px);
}

.page-contact .channel-intro {
  max-width: 68ch;
  margin: 0 0 clamp(6px, 1vw, 10px);
  font-size: 1rem;
  line-height: 1.78;
  color: var(--contact-muted);
}

/* 01 三条通道 */
.page-contact .channel-list {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .channel {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 30px);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--contact-panel-glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: border-color var(--speed) var(--ease),
    background-color var(--speed) var(--ease),
    transform var(--speed) var(--ease);
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  border-color: var(--purple);
  background-color: rgba(124, 59, 255, 0.1);
  transform: translateX(4px);
}

.page-contact .channel-key {
  color: var(--purple-2);
}

.page-contact .channel-title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.02rem, 1.6vw, 1.22rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-contact .channel-title-mail {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(0.94rem, 1.5vw, 1.12rem);
  letter-spacing: 0;
}

.page-contact .channel-desc {
  margin: 0;
  max-width: 66ch;
  font-size: 0.94rem;
  line-height: 1.76;
  color: var(--contact-muted);
}

/* 02 邮件要素 */
.page-contact .mail-steps {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .mail-step {
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  transition: border-color var(--speed) var(--ease);
}

.page-contact .mail-step:hover {
  border-color: var(--purple-2);
}

.page-contact .step-num {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--ice);
}

.page-contact .step-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.05rem, 1.5vw, 1.18rem);
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .step-text {
  margin: 0;
  max-width: 46ch;
  font-size: 0.94rem;
  line-height: 1.74;
  color: var(--contact-muted);
}

/* 03 合作方向 */
.page-contact .collab-stage {
  position: relative;
  isolation: isolate;
  margin-top: clamp(24px, 3.6vw, 44px);
  padding: clamp(20px, 3.2vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-contact .collab-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
  z-index: -2;
}

.page-contact .collab-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    158deg,
    rgba(11, 10, 16, 0.7) 0%,
    rgba(11, 10, 16, 0.93) 56%,
    rgba(11, 10, 16, 0.99) 100%
  );
}

.page-contact .collab-grid {
  display: grid;
  gap: 14px;
}

.page-contact .collab-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(22, 20, 31, 0.78);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: border-color var(--speed) var(--ease),
    background-color var(--speed) var(--ease);
}

.page-contact .collab-card:hover {
  border-color: var(--purple-2);
}

.page-contact .collab-card[open] {
  border-color: var(--purple);
  background-color: rgba(124, 59, 255, 0.12);
}

.page-contact .collab-card > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(16px, 2.2vw, 22px) clamp(18px, 2.4vw, 26px);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .collab-card > summary::-webkit-details-marker {
  display: none;
}

.page-contact .collab-card > summary::after {
  content: "＋";
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--purple-2);
  transition: color var(--speed) var(--ease);
}

.page-contact .collab-card[open] > summary::after {
  content: "－";
  color: var(--ice);
}

.page-contact .collab-card > summary:focus-visible {
  outline: 2px solid var(--purple-2);
  outline-offset: 3px;
  border-radius: 12px;
}

.page-contact .collab-body {
  padding: 0 clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 26px);
  max-width: 62ch;
  font-size: 0.93rem;
  line-height: 1.76;
  color: var(--contact-muted);
}

.page-contact .collab-body p {
  margin: 0 0 10px;
}

.page-contact .collab-body p:last-child {
  margin-bottom: 0;
}

/* 04 回复节奏 */
.page-contact .response-grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(22px, 3.4vw, 38px);
}

.page-contact .response-figure {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 3px solid var(--ice);
}

.page-contact .response-num {
  font-family: var(--font-mono);
  font-size: clamp(2.9rem, 9vw, 5.2rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-contact .response-unit {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--ice);
}

.page-contact .response-text p {
  margin: 0 0 14px;
  max-width: 68ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--contact-muted);
}

.page-contact .response-text p:last-child {
  margin-bottom: 0;
}

/* 05 地址与时间 */
.page-contact .visit-grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(22px, 3.4vw, 38px);
}

.page-contact .visit-card {
  border-radius: var(--radius-card);
  padding: clamp(22px, 3vw, 34px);
  color: var(--ink);
}

.page-contact .visit-icon {
  display: block;
  width: 30px;
  height: 30px;
  margin-bottom: 14px;
  fill: var(--ink-deep);
  opacity: 0.82;
}

.page-contact .visit-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--ink-deep);
}

.page-contact .visit-value {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink-deep);
  overflow-wrap: anywhere;
}

.page-contact .visit-note {
  margin: 0;
  max-width: 52ch;
  font-size: 0.9rem;
  line-height: 1.72;
  color: rgba(26, 22, 34, 0.76);
}

/* 收尾入口 */
.page-contact .contact-tail {
  padding-top: clamp(8px, 1.6vw, 16px);
}

.page-contact .tail-lead {
  margin: 0;
  color: var(--cream-2);
}

.page-contact .tail-list {
  list-style: none;
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .tail-link {
  display: block;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  color: var(--white);
  transition: border-color var(--speed) var(--ease),
    background-color var(--speed) var(--ease);
}

.page-contact .tail-link:hover,
.page-contact .tail-link:focus-visible {
  border-color: var(--purple);
  background-color: rgba(124, 59, 255, 0.1);
}

.page-contact .tail-title {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}

.page-contact .tail-desc {
  display: block;
  font-size: 0.88rem;
  line-height: 1.62;
  color: var(--contact-muted);
}

/* 锚点定位留白 */
.page-contact [id] {
  scroll-margin-top: 96px;
}

/* 平板与桌面 */
@media (min-width: 760px) {
  .page-contact .channel {
    grid-template-columns: 156px minmax(0, 1fr);
    align-items: baseline;
    gap: 6px 26px;
  }

  .page-contact .mail-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 32px;
  }

  .page-contact .mail-step:nth-child(even) {
    margin-top: 30px;
  }

  .page-contact .tail-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 20px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-contact .hero-figure img {
    aspect-ratio: 4 / 5;
  }

  .page-contact .collab-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .collab-card:first-child {
    grid-column: 1 / -1;
  }

  .page-contact .collab-card:last-child {
    grid-column: 2 / 3;
  }

  .page-contact .response-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: center;
  }

  .page-contact .visit-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 22px;
  }
}

@media (min-width: 1180px) {
  .page-contact .collab-stage {
    padding-left: clamp(36px, 4vw, 56px);
    padding-right: clamp(36px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}