.page-contact {
  display: block;
  background: var(--pitch);
  color: var(--chalk);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  padding-top: 20px;
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--mist);
  opacity: 0.5;
}

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

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan-30);
}

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--cyan-soft);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-block: clamp(28px, 5vw, 56px) clamp(40px, 7vw, 92px);
  border-bottom: var(--line-hair) solid var(--grid-soft);
  background-image:
    linear-gradient(to right, var(--grid-faint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-faint) 1px, transparent 1px);
  background-size: 96px 96px;
  overflow: hidden;
}

.page-contact .contact-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 48px);
  align-items: center;
}

.page-contact .contact-hero__text {
  min-width: 0;
}

.page-contact .contact-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 9vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--chalk);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-contact .contact-hero__lede {
  margin: 22px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .contact-hero__meta {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  font-size: 13px;
  line-height: 1.85;
  color: var(--mist);
  opacity: 0.85;
}

.page-contact .contact-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-contact .contact-hero__figure .figure__media {
  border: 2px solid var(--grid);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

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

.page-contact .figure__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--mist);
  opacity: 0.72;
}

/* ---------- 主体：左粘性栏 + 右画布 ---------- */
.page-contact .contact-body {
  background: var(--pitch);
  padding-block: clamp(36px, 6vw, 76px);
}

.page-contact .contact-body__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 44px);
  align-items: start;
}

/* 左侧联络清单 */
.page-contact .contact-rail {
  position: relative;
  min-width: 0;
  padding: clamp(20px, 3.4vw, 28px);
  background: var(--ink-abyss);
  border: var(--line-hair) solid var(--grid);
  border-left: 3px solid var(--cyan);
}

.page-contact .contact-rail__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-contact .contact-rail__note {
  margin: 10px 0 6px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
  opacity: 0.8;
}

.page-contact .channel {
  padding: 18px 12px 18px 10px;
  margin-inline: -10px;
  border-top: var(--line-hair) solid var(--grid-soft);
  transition: background-color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.page-contact .channel:first-of-type {
  border-top: 0;
}

.page-contact .channel:hover {
  background: var(--cyan-12);
  border-top-color: var(--cyan-30);
}

.page-contact .channel__label {
  margin: 0;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-contact .channel__value {
  margin: 8px 0 0;
  font-family: var(--font-data);
  font-size: clamp(14px, 2.4vw, 17px);
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--cyan-soft);
  word-break: break-word;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .channel:hover .channel__value {
  color: var(--cyan);
}

.page-contact .channel__use {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .channel--quiet {
  border-top-style: dashed;
}

.page-contact .channel--quiet .channel__value {
  font-size: 13px;
  color: var(--mist);
  opacity: 0.9;
}

.page-contact .channel--quiet:hover .channel__value {
  color: var(--cyan-soft);
}

.page-contact .contact-rail__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: var(--line-hair) solid var(--grid);
  font-size: 12px;
  line-height: 1.8;
  color: var(--mist);
  opacity: 0.68;
}

/* 右侧连续画布 */
.page-contact .contact-canvas {
  min-width: 0;
  padding: clamp(24px, 4vw, 46px);
  background: var(--ink);
  border: var(--line-hair) solid var(--grid);
}

.page-contact .canvas-block + .canvas-block {
  margin-top: clamp(34px, 5vw, 62px);
  padding-top: clamp(28px, 4vw, 46px);
  border-top: var(--line-hair) solid var(--grid-soft);
}

.page-contact .canvas-block__head {
  max-width: 60ch;
}

.page-contact .canvas-block h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-contact .canvas-block__intro {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .canvas-block__intro a,
.page-contact .canvas-note a,
.page-contact .boundary__body a {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .canvas-block__intro a:hover,
.page-contact .canvas-note a:hover,
.page-contact .boundary__body a:hover {
  color: var(--cyan);
}

/* 勘误：步骤 + 影像 */
.page-contact .fix-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 34px);
  margin-top: 26px;
}

.page-contact .step-list {
  display: grid;
  gap: 8px;
  align-content: start;
  min-width: 0;
}

.page-contact .step-list .index-group {
  border-left: 3px solid var(--grid);
  transition: border-color var(--t-fast) var(--ease);
}

.page-contact .step-list .index-group[open] {
  border-left-color: var(--cyan);
}

.page-contact .step-label {
  font-size: 15px;
  line-height: 1.5;
  color: var(--chalk);
}

.page-contact .step-list .index-group__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .contact-figure {
  margin: 0;
  min-width: 0;
}

.page-contact .contact-figure .figure__media {
  border: 2px solid var(--grid);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

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

/* 条目式清单 */
.page-contact .rule-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
}

.page-contact .rule-list li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-top: var(--line-hair) solid var(--grid-soft);
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .rule-list li:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-contact .rule-list__key {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-contact .rule-list--cyan .rule-list__key {
  color: var(--cyan);
}

.page-contact .canvas-note {
  margin: 24px 0 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--mist);
  opacity: 0.82;
}

/* 受理边界折叠 */
.page-contact .boundary {
  margin-top: 22px;
  background: var(--ink-abyss);
  border: var(--line-hair) solid var(--grid);
  border-left: 3px solid var(--amber);
}

.page-contact .boundary > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

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

.page-contact .boundary > summary::after {
  content: "+";
  flex: none;
  font-size: 16px;
  color: var(--amber);
}

.page-contact .boundary[open] > summary::after {
  content: "−";
}

.page-contact .boundary > summary:hover,
.page-contact .boundary > summary:focus-visible {
  background: var(--amber-20);
  color: var(--chalk);
}

.page-contact .boundary__body {
  padding: 0 18px 20px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--mist);
  opacity: 0.62;
}

.page-contact .boundary__body p {
  margin: 0 0 12px;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .fix-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

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

@media (min-width: 960px) {
  .page-contact .contact-body__inner {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 68px);
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 112px;
  }
}

@media (max-width: 480px) {
  .page-contact .contact-hero h1 {
    transform: skewX(-1deg);
  }

  .page-contact .channel {
    margin-inline: 0;
    padding-inline: 0;
  }

  .page-contact .contact-canvas {
    padding-inline: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel__value,
  .page-contact .step-list .index-group,
  .page-contact .boundary > summary,
  .page-contact .breadcrumb a {
    transition: none;
  }

  .page-contact .contact-hero h1 {
    transform: none;
  }
}