.page-contact {
  --pc-pad: clamp(18px, 2.6vw, 30px);
  --pc-mono: clamp(15px, 1.9vw, 21px);
  background:
    radial-gradient(120% 78% at 100% -10%, rgba(56, 242, 208, 0.08), transparent 62%),
    radial-gradient(90% 60% at 0% 100%, rgba(242, 184, 75, 0.05), transparent 70%),
    var(--bg-deep);
  color: var(--text-primary);
  padding-bottom: clamp(36px, 5vw, 64px);
  overflow-x: clip;
}

.page-contact :is(a, summary):focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 面包屑 */
.page-contact .breadcrumb {
  padding-top: clamp(16px, 2.4vw, 28px);
}

.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.page-contact .breadcrumb-item {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
}

.page-contact .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-green);
}

.page-contact .breadcrumb-link {
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .breadcrumb-link:hover {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan-dim);
}

.page-contact .breadcrumb-current {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}

/* 首屏 */
.page-contact .contact-hero {
  display: grid;
  gap: var(--gap-lg);
  padding-block: clamp(22px, 3.4vw, 44px) clamp(26px, 4vw, 50px);
  border-bottom: 1px solid var(--line-green);
}

.page-contact .contact-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.page-contact .contact-hero-lead {
  margin: 16px 0 0;
  max-width: 54ch;
  color: var(--text-secondary);
  font-size: clamp(14.5px, 1.4vw, 16px);
  line-height: 1.78;
}

.page-contact .hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-md);
  margin-top: clamp(20px, 3vw, 32px);
  padding-top: 18px;
  border-top: 1px dashed var(--line-green);
}

.page-contact .hero-fact {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 96px;
}

.page-contact .hero-fact .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-contact .hero-fact strong {
  font-family: var(--font-head);
  font-size: clamp(19px, 2.5vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--accent-cyan);
}

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

.page-contact .media-frame {
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-green);
  background: linear-gradient(150deg, var(--surface-moss), var(--bg-carbon));
}

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

.page-contact .media-caption {
  margin: 10px 0 0;
  color: var(--text-secondary);
  font-size: 12.5px;
  line-height: 1.65;
}

/* 分栏骨架 */
.page-contact .contact-split {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  padding-block: clamp(28px, 4.4vw, 56px);
}

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

/* 联系方式卡 */
.page-contact .channel-card {
  position: relative;
  padding: var(--pc-pad);
  border: 1px solid var(--line-green);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, var(--surface-moss) 0%, var(--bg-carbon) 80%);
  overflow: hidden;
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 26px;
  bottom: 26px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-cyan-dim) 58%, transparent);
}

.page-contact .channel-svg {
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
  margin: clamp(14px, 2vw, 20px) 0 clamp(16px, 2.2vw, 22px);
}

.page-contact .channel-list {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  margin: 0;
}

.page-contact .channel {
  display: grid;
  gap: 5px;
  margin: 0;
}

.page-contact .channel-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-contact .channel-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--pc-mono);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.page-contact .channel-value a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--accent-cyan-dim);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .channel-value a:hover {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

/* 区块标题 */
.page-contact .section-title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.page-contact .section-lead {
  margin: 10px 0 0;
  max-width: 62ch;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

/* 咨询分类 */
.page-contact .inquiry-list {
  display: grid;
  gap: 10px;
  margin-top: var(--gap-md);
}

.page-contact .inquiry-item {
  border: 1px solid var(--line-green);
  border-radius: var(--radius-md);
  background: rgba(15, 39, 33, 0.62);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .inquiry-item:hover {
  border-color: var(--accent-cyan-dim);
  background: var(--surface-moss);
  transform: translateY(-2px);
}

.page-contact .inquiry-item[open] {
  border-color: var(--accent-cyan-dim);
  background: var(--surface-moss);
}

.page-contact .inquiry-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px clamp(14px, 2vw, 20px);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .inquiry-summary::after {
  content: "+";
  margin-inline-start: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--accent-cyan);
}

.page-contact .inquiry-item[open] .inquiry-summary::after {
  content: "\2212";
}

.page-contact .inquiry-title {
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.page-contact .inquiry-body {
  padding: 0 clamp(14px, 2vw, 20px) clamp(16px, 2vw, 20px);
  border-top: 1px solid var(--line-green);
}

.page-contact .inquiry-body p {
  margin: 14px 0 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

.page-contact .inquiry-body ul {
  display: grid;
  gap: 7px;
  margin: 12px 0 0;
  padding-inline-start: 18px;
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.65;
}

.page-contact .inquiry-body li::marker {
  color: var(--accent-cyan-dim);
}

.page-contact .inquiry-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
}

.page-contact .inquiry-figure .media-frame {
  aspect-ratio: 3 / 2;
}

/* 提交前准备 */
.page-contact .prep-section {
  margin-top: clamp(30px, 4.4vw, 54px);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: 1px solid var(--line-green);
}

.page-contact .prep-list {
  display: grid;
  gap: 10px;
  margin: var(--gap-md) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px clamp(14px, 2vw, 18px);
  border-radius: var(--radius-sm);
  border-inline-start: 2px solid var(--accent-cyan-dim);
  background: var(--surface-moss);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-contact .prep-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent-cyan);
  padding-top: 3px;
}

.page-contact .prep-item strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* 响应节奏 */
.page-contact .response-section {
  margin-top: clamp(30px, 4.4vw, 54px);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: 1px solid var(--line-green);
}

.page-contact .response-card {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: var(--gap-md);
  padding: var(--pc-pad);
  border: 1px solid var(--line-green);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, var(--surface-raised) 0%, var(--bg-carbon) 74%);
}

.page-contact .response-stat {
  display: grid;
  gap: 6px;
}

.page-contact .response-stat strong {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 27px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--accent-cyan);
  overflow-wrap: anywhere;
}

.page-contact .response-stat span {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.page-contact .response-note {
  margin: 16px 0 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
  max-width: 66ch;
}

/* 邮件主题 */
.page-contact .coop-section {
  margin-top: clamp(30px, 4.4vw, 54px);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: 1px solid var(--line-green);
}

.page-contact .subject-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: var(--gap-md) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .subject-chip {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.4;
  padding: 9px 13px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-sm);
  background: var(--bg-carbon);
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.page-contact .subject-chip em {
  font-style: normal;
  color: var(--accent-cyan);
  margin-inline-end: 6px;
}

.page-contact .coop-note {
  margin: 18px 0 0;
  max-width: 66ch;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
}

/* 地址与备案 */
.page-contact .contact-footline {
  display: grid;
  gap: var(--gap-md);
  margin-top: clamp(30px, 4.4vw, 56px);
  padding-top: clamp(18px, 2.6vw, 26px);
  border-top: 1px solid var(--line-green);
}

.page-contact .footline-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-contact .footline-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(13.5px, 1.7vw, 16px);
  line-height: 1.6;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

/* 响应式 */
@media (min-width: 720px) {
  .page-contact .response-card {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .contact-footline {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }
}

@media (min-width: 1040px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .channel-rail {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .inquiry-item,
  .page-contact .breadcrumb-link,
  .page-contact .channel-value a {
    transition: none;
  }

  .page-contact .inquiry-item:hover {
    transform: none;
  }
}
<<<END>>>