.page-contact {
  --contact-grid: rgba(27, 63, 92, 0.45);
  --contact-tick: rgba(47, 227, 214, 0.30);
  padding-bottom: clamp(64px, 8vw, 112px);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 28px;
  padding-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-contact .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.page-contact .breadcrumb a:hover {
  color: var(--coral-soft);
}

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

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

/* ---------- 首屏信号框景 ---------- */
.page-contact .contact-hero {
  padding-top: 4px;
}

.page-contact .hero-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(158deg, rgba(18, 48, 72, 0.95) 0%, rgba(6, 23, 38, 0.98) 64%),
    var(--abyss);
  padding: clamp(22px, 3.6vw, 48px);
}

.page-contact .hero-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--contact-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.55;
}

.page-contact .hero-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  z-index: 3;
  height: 7px;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, var(--cyan) 0 1px, transparent 1px 24px);
  opacity: 0.42;
}

.page-contact .hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  opacity: 0.34;
}

.page-contact .hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 44px);
}

.page-contact .hero-lead .eyebrow {
  margin: 0;
  color: var(--coral-soft);
}

.page-contact .hero-lead h1 {
  margin: 14px 0 18px;
  max-width: 16em;
  font-size: clamp(31px, 5.4vw, 54px);
  line-height: 1.14;
  letter-spacing: 0.05em;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .hero-sub {
  margin: 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .hero-stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 20px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  border-top: 1px solid var(--line-faint);
}

.page-contact .hero-stats li {
  display: grid;
  gap: 4px;
}

.page-contact .stat-num {
  font-size: clamp(19px, 2.6vw, 28px);
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-contact .stat-label {
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-contact .hero-aside {
  display: grid;
  align-content: start;
  gap: 18px;
}

.page-contact .prep-card {
  border-left: 3px solid var(--coral);
}

.page-contact .prep-card__title {
  margin: 0 0 16px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--ink);
}

.page-contact .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .prep-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--mist);
}

.page-contact .prep-idx {
  padding-top: 3px;
  font-size: 12px;
  color: var(--cyan);
}

.page-contact .prep-card__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-faint);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--cyan);
  word-break: break-word;
}

/* ---------- 章节基线 ---------- */
.page-contact .section {
  scroll-margin-top: 120px;
  padding-top: clamp(56px, 7vw, 96px);
}

.page-contact .section-head {
  margin-bottom: clamp(24px, 3vw, 40px);
}

.page-contact .section-head > p {
  max-width: 46em;
  color: var(--mist);
}

/* ---------- 三条通道 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 2.6vw, 32px);
}

.page-contact .channel-list {
  display: grid;
  gap: 18px;
}

.page-contact .channel-card {
  position: relative;
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--hull);
  transition: transform 160ms var(--ease), background-color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-contact .channel-card--a {
  border-left: 4px solid var(--coral);
}

.page-contact .channel-card--b {
  background: transparent;
  border: 1px dashed var(--line-soft);
}

.page-contact .channel-card--c {
  background: var(--raise);
  border-color: var(--line);
}

.page-contact .channel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.page-contact .channel-code {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-contact .channel-title {
  margin: 0;
  font-size: clamp(19px, 2.2vw, 23px);
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-contact .channel-desc {
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .channel-prep {
  list-style: none;
  margin: 18px 0 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--line-faint);
  display: grid;
  gap: 10px;
}

.page-contact .channel-prep li {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.66;
  color: var(--ink);
}

.page-contact .prep-key {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--mint);
}

.page-contact .channel-figure {
  margin: 0;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .channel-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--hull);
}

.page-contact .channel-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 联系方式 ---------- */
.page-contact .reach-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
}

.page-contact .reach-card {
  border-top: 3px solid var(--coral);
}

.page-contact .contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .contact-list li {
  display: grid;
  gap: 6px;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--line-faint);
}

.page-contact .contact-list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-contact .contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-contact .contact-value {
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .contact-note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-faint);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .reach-note h3 {
  margin: 0 0 14px;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-contact .reach-note ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .reach-note li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--mist);
}

.page-contact .reach-note li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

/* ---------- 邮件写法 ---------- */
.page-contact .compose-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 2.6vw, 32px);
}

.page-contact .compose-subject {
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(47, 227, 214, 0.10), rgba(6, 23, 38, 0.35));
}

.page-contact .compose-label {
  display: block;
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-contact .subject-line {
  margin: 0 0 18px;
  padding: 14px 16px;
  border: 1px dashed var(--contact-tick);
  border-radius: var(--radius-sm);
  background: rgba(6, 23, 38, 0.72);
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 17px);
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .subject-examples {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .subject-examples li {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--mist);
  word-break: break-word;
}

.page-contact .subject-examples li::before {
  content: "→ ";
  color: var(--coral-soft);
}

.page-contact .compose-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .compose-steps li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line-faint);
}

.page-contact .compose-steps li:first-child {
  padding-top: 0;
  border-top: none;
}

.page-contact .step-num {
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--coral);
}

.page-contact .compose-steps h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-contact .compose-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 运营信息 ---------- */
.page-contact .ops-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 2.6vw, 30px);
}

.page-contact .ops-list {
  margin: 0;
  display: grid;
}

.page-contact .ops-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-contact .ops-item:first-child {
  padding-top: 0;
}

.page-contact .ops-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

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

.page-contact .ops-item dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--mist);
}

.page-contact .ops-license {
  align-self: start;
  border-left: 3px solid var(--amber);
}

.page-contact .ops-license__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .ops-license__value {
  margin: 0 0 12px;
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .ops-license__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .ops-license__link {
  margin: 14px 0 0;
}

.page-contact .ops-license__link a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--coral-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-contact .ops-license__link a:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 相关栏目 ---------- */
.page-contact .next-stops {
  margin-top: clamp(48px, 6vw, 80px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line);
}

.page-contact .next-stops__title {
  margin: 0 0 20px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-contact .next-stops__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-contact .next-stops__list a {
  display: block;
  padding: 14px 16px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: rgba(13, 36, 57, 0.72);
  font-size: 15px;
  line-height: 1.62;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease), color 160ms var(--ease);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-contact .reach-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }

  .page-contact .ops-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }
}

@media (min-width: 960px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }

  .page-contact .next-stops__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 28px;
  }
}

@media (min-width: 1024px) {
  .page-contact .channel-grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr);
    align-items: start;
  }

  .page-contact .channel-figure {
    position: sticky;
    top: 132px;
  }
}

@media (min-width: 1080px) {
  .page-contact .compose-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }
}

@media (hover: hover) {
  .page-contact .channel-card:hover {
    transform: translateY(-2px);
    background: var(--raise);
    border-color: var(--contact-tick);
  }

  .page-contact .next-stops__list a:hover {
    border-left-color: var(--coral);
    background: var(--raise);
    color: var(--coral-soft);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .next-stops__list a,
  .page-contact .ops-license__link a,
  .page-contact .breadcrumb a {
    transition: none;
  }

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