/* ===== 联系我们 · 页面专属样式（作用域 .page-contact） ===== */

.page-contact {
  --contact-gap: clamp(16px, 2vw, 24px);
  --contact-pad: clamp(20px, 2.6vw, 32px);
}

/* --- 面包屑条 --- */
.page-contact .breadcrumb-bar {
  padding-top: clamp(18px, 3vw, 34px);
}

/* --- 首屏 --- */
.page-contact .contact-intro {
  border-top: 0;
  padding-block: clamp(22px, 4vw, 46px) clamp(30px, 5vw, 68px);
}

.page-contact .intro-copy h1 {
  font-size: var(--fs-h1);
  font-weight: 250;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin: 16px 0 0;
  max-width: 17ch;
}

.page-contact .intro-lede {
  margin: 24px 0 0;
  max-width: 52ch;
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--text-index);
  padding-left: 18px;
  border-left: 2px solid var(--pulse-cyan);
}

.page-contact .intro-points {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.04em;
  color: var(--text-index);
}

.page-contact .intro-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.page-contact .intro-visual {
  margin-top: 30px;
}

.page-contact .intro-visual .media-caption {
  margin-top: 12px;
}

/* --- 渠道卡 --- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-contact .channel-card {
  position: relative;
  min-width: 0;
  background:
    linear-gradient(180deg, rgba(0, 229, 255, 0.055), rgba(0, 229, 255, 0) 44%),
    var(--cabin-panel);
  border: var(--rule-hard);
  border-top: 3px solid var(--pulse-cyan);
  box-shadow: var(--shadow-hard);
  padding: var(--contact-pad);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--dur-panel) var(--ease-panel),
              box-shadow var(--dur-panel) var(--ease-panel);
}

.page-contact .channel-card--phone {
  border-top-color: var(--neon-violet);
}

.page-contact .channel-card--addr {
  border-top-color: var(--amber-alert);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translate(-2px, -2px);
  box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.68);
}

.page-contact .channel-card:focus-visible {
  outline: 2px solid var(--pulse-cyan);
  outline-offset: 4px;
}

.page-contact .channel-name {
  font-size: var(--fs-h3);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  margin: 2px 0 0;
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-size: clamp(16px, 1.5vw, 21px);
  line-height: 1.45;
  letter-spacing: 0.01em;
  overflow-wrap: anywhere;
  margin: 10px 0 0;
  color: var(--text-primary);
}

.page-contact .channel-card--mail .channel-value {
  color: var(--pulse-cyan);
}

.page-contact .channel-card--phone .channel-value {
  color: var(--mist-lilac);
}

.page-contact .channel-card--addr .channel-value {
  font-family: var(--font-cn);
  font-size: clamp(15px, 1.4vw, 18px);
  letter-spacing: 0.01em;
  line-height: 1.7;
  color: var(--text-primary);
}

.page-contact .channel-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: 0.08em;
  color: var(--text-index);
}

.page-contact .channel-fit {
  margin-top: 0;
  padding-top: 0;
  border-top: 1px dashed transparent;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: var(--fs-index);
  color: var(--text-index);
  transition: max-height var(--dur-panel) var(--ease-panel),
              opacity var(--dur-panel) var(--ease-panel),
              margin-top var(--dur-panel) var(--ease-panel),
              padding-top var(--dur-panel) var(--ease-panel),
              border-top-color var(--dur-panel) var(--ease-panel);
}

.page-contact .channel-card:hover .channel-fit,
.page-contact .channel-card:focus-within .channel-fit {
  margin-top: 16px;
  padding-top: 14px;
  border-top-color: var(--edge-line);
  max-height: 280px;
  opacity: 1;
}

.page-contact .channel-fit ul {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-contact .channel-fit li {
  position: relative;
  padding-left: 16px;
  line-height: 1.7;
}

.page-contact .channel-fit li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--pulse-cyan);
}

/* --- 用途边界 --- */
.page-contact .usage-section .prose h3 {
  margin-top: 28px;
}

.page-contact .usage-side {
  margin-top: 32px;
}

.page-contact .panel-note {
  margin: 8px 0 18px;
  font-size: var(--fs-index);
  line-height: 1.75;
  color: var(--text-index);
}

.page-contact .side-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .side-links li {
  border-bottom: var(--rule);
}

.page-contact .side-links li:last-child {
  border-bottom: 0;
}

.page-contact .side-links a {
  display: block;
  padding: 14px 4px 14px 12px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur-micro) ease-out,
              border-left-color var(--dur-micro) ease-out,
              background-color var(--dur-micro) ease-out;
}

.page-contact .side-links a:hover,
.page-contact .side-links a:focus-visible {
  color: var(--pulse-cyan);
  border-left-color: var(--pulse-cyan);
  background-color: rgba(0, 229, 255, 0.05);
}

/* --- 准备清单 --- */
.page-contact .checklist {
  list-style: none;
  margin: clamp(22px, 3vw, 36px) 0 0;
  padding: 0;
  border-top: var(--rule);
}

.page-contact .checklist > li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px 4px;
  border-bottom: var(--rule);
}

.page-contact .check-index {
  min-width: 34px;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.1em;
  color: var(--neon-violet);
}

.page-contact .checklist h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.page-contact .checklist p {
  margin: 0;
  font-size: var(--fs-index);
  line-height: 1.78;
  color: var(--text-index);
}

/* --- 响应节奏 --- */
.page-contact .response-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  margin-top: clamp(22px, 3vw, 36px);
}

.page-contact .response-card {
  min-width: 0;
  background: var(--cabin-panel);
  border: var(--rule);
  border-left: 3px solid var(--edge-line);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.page-contact .response-card--cyan {
  border-left-color: var(--pulse-cyan);
}

.page-contact .response-card--violet {
  border-left-color: var(--neon-violet);
}

.page-contact .response-card--amber {
  border-left-color: var(--amber-alert);
}

.page-contact .response-card--ok {
  border-left-color: var(--state-ok);
}

.page-contact .rc-value {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: clamp(21px, 2.4vw, 30px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.page-contact .rc-label {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-index);
}

.page-contact .rc-note {
  margin: 4px 0 0;
  font-size: var(--fs-index);
  line-height: 1.72;
  color: var(--text-index);
}

.page-contact .response-text {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: 14px;
  max-width: 76ch;
}

.page-contact .response-text p {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--text-index);
}

/* --- 备案落款 --- */
.page-contact .record-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(22px, 3.4vw, 44px);
  border: var(--rule-hard);
  background:
    linear-gradient(140deg, rgba(124, 77, 255, 0.12), rgba(0, 229, 255, 0.05) 52%, rgba(0, 0, 0, 0) 82%),
    var(--cabin-panel);
  box-shadow: var(--shadow-hard);
}

.page-contact .record-text h2 {
  margin: 10px 0 0;
  font-size: var(--fs-h2);
  font-weight: 300;
  color: var(--text-primary);
}

.page-contact .record-list {
  margin: 22px 0 0;
  border-top: var(--rule);
}

.page-contact .record-list > div {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 14px;
  padding: 12px 0;
  border-bottom: var(--rule);
}

.page-contact .record-list dt {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: 0.12em;
  color: var(--text-index);
}

.page-contact .record-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.page-contact .record-note {
  margin: 18px 0 0;
  font-size: var(--fs-index);
  line-height: 1.8;
  color: var(--text-index);
}

/* --- 页尾引导 --- */
.page-contact .tail-panel {
  display: grid;
  gap: 20px;
  align-items: center;
  padding: clamp(22px, 3vw, 36px);
  border: var(--rule-hard);
  border-left: 4px solid var(--pulse-cyan);
  background: var(--cabin-raised);
}

.page-contact .tail-panel h2 {
  margin: 10px 0 10px;
  font-size: var(--fs-h2);
  font-weight: 300;
  color: var(--text-primary);
}

.page-contact .tail-panel p {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--text-index);
}

/* --- 响应式 --- */
@media (min-width: 760px) {
  .page-contact .response-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .tail-panel {
    grid-template-columns: 1fr auto;
  }
}

@media (min-width: 900px) {
  .page-contact .intro-visual {
    margin-top: 8px;
  }

  .page-contact .channel-grid {
    grid-template-columns: 1.5fr 1fr 1.2fr;
    align-items: start;
  }

  .page-contact .usage-side {
    margin-top: 0;
  }

  .page-contact .record-board {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-contact .response-grid {
    grid-template-columns: 1.35fr 1fr 1fr 1.15fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .channel-fit,
  .page-contact .side-links a {
    transition: none;
  }

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