.page-contact {
  --contact-rail: 336px;
  --contact-body: #C3D4CB;
  --contact-edge: 2px solid var(--moss);
  padding-top: 26px;
  background: var(--ink);
  color: var(--paper);
}

.page-contact .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-contact .breadcrumb {
  margin-bottom: 20px;
  font-size: 13px;
}

/* ---------- 开篇 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: 22px;
  padding: 26px 20px;
  border: var(--contact-edge);
  background:
    radial-gradient(120% 92% at 88% 6%, rgba(183, 255, 60, .10), transparent 62%),
    linear-gradient(155deg, var(--pine) 0%, var(--navy) 58%, var(--ink) 100%);
  box-shadow: var(--shadow-hard);
}

.page-contact .contact-hero h1 {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(29px, 6.2vw, 46px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .contact-hero__lead {
  margin: 0 0 20px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--contact-body);
}

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

.page-contact .contact-hero__quick li {
  padding-left: 12px;
  border-left: 2px solid var(--moss);
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray);
}

.page-contact .contact-hero__quick .mono {
  color: var(--lime);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

.page-contact .contact-hero__figure {
  margin: 0;
  border: var(--contact-edge);
  background: var(--navy);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-contact .contact-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.66) contrast(1.06);
}

/* ---------- 主体分栏 ---------- */
.page-contact .contact-layout {
  display: grid;
  gap: 28px;
  margin-top: 36px;
}

/* ---------- 左侧联系面板 ---------- */
.page-contact .contact-rail {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .contact-rail__head {
  margin: 0 0 4px;
  padding-bottom: 10px;
  border-bottom: var(--contact-edge);
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-contact .channel {
  display: grid;
  gap: 6px;
  padding: 16px 16px 15px;
  border: var(--contact-edge);
  background: var(--pine);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-contact .channel:hover {
  border-color: var(--lime);
  background: #163024;
}

.page-contact .channel__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .channel__value--mail {
  font-size: 14px;
  color: var(--lime);
}

.page-contact .channel__value--addr {
  font-size: 14px;
  letter-spacing: .01em;
}

.page-contact .channel__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--gray);
}

.page-contact .rail-note {
  margin: 4px 0 0;
  padding: 14px 16px;
  border: var(--contact-edge);
  border-left: 4px solid var(--orange);
  background: rgba(11, 27, 43, .78);
  font-size: 13px;
  line-height: 1.72;
  color: var(--gray);
}

/* ---------- 右侧信息流 ---------- */
.page-contact .contact-flow {
  min-width: 0;
}

.page-contact .flow-index {
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
  padding: 0 0 12px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-contact .flow-index a {
  flex: none;
  padding: 8px 14px;
  border: var(--contact-edge);
  background: var(--navy);
  color: var(--paper);
  font-size: 13px;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .18s var(--ease), color .18s var(--ease), background-color .18s var(--ease);
}

.page-contact .flow-index a:hover,
.page-contact .flow-index a:focus-visible {
  border-color: var(--lime);
  background: #0E2418;
  color: var(--lime);
}

.page-contact .routes {
  display: block;
}

.page-contact .route {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 8px 20px 0;
  border-top: 1px solid var(--moss);
  scroll-margin-top: 132px;
  transition: background-color .2s var(--ease);
}

.page-contact .route:last-child {
  border-bottom: 1px solid var(--moss);
}

.page-contact .route:hover {
  background: linear-gradient(90deg, rgba(183, 255, 60, .07), transparent 68%);
}

.page-contact .route__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: var(--contact-edge);
  background: var(--navy);
  color: var(--mist);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .route:hover .route__mark {
  color: var(--lime);
  border-color: var(--lime);
}

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

.page-contact .route__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-contact .route__title {
  margin: 3px 0 9px;
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1.3;
  color: var(--paper);
  transition: color .18s var(--ease);
}

.page-contact .route:hover .route__title {
  color: var(--lime);
}

.page-contact .route__desc {
  margin: 0 0 12px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--contact-body);
}

.page-contact .route__need {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .route__need li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gray);
}

.page-contact .route__need li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mist);
}

/* ---------- 通用区块 ---------- */
.page-contact .flow-block {
  margin-top: 32px;
  padding: 24px 20px;
  border: var(--contact-edge);
  background: linear-gradient(180deg, var(--pine), var(--ink));
  scroll-margin-top: 132px;
}

.page-contact .flow-block .section-head__title {
  font-size: 22px;
  line-height: 1.35;
}

/* ---------- 提交清单 ---------- */
.page-contact .checklist {
  display: grid;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--moss);
}

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 0;
  border-bottom: 1px solid var(--moss);
}

.page-contact .checklist__box {
  position: relative;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 2px solid var(--moss);
  background: var(--ink);
}

.page-contact .checklist__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--lime);
  border-bottom: 2px solid var(--lime);
  transform: rotate(40deg);
}

.page-contact .checklist__text {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--contact-body);
}

/* ---------- 回复节奏 ---------- */
.page-contact .cadence {
  display: grid;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .cadence__row {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--moss);
}

.page-contact .cadence__row:first-child {
  padding-top: 4px;
}

.page-contact .cadence__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--lime);
}

.page-contact .cadence__desc {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--contact-body);
}

/* ---------- 投稿与合作 ---------- */
.page-contact .contribute__grid {
  display: grid;
  gap: 22px;
}

.page-contact .contribute__grid .kicker {
  margin: 0 0 4px;
}

.page-contact .contribute__list {
  display: grid;
  gap: 11px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contribute__list li {
  padding-left: 14px;
  border-left: 2px solid var(--moss);
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--contact-body);
}

.page-contact .contribute__list strong {
  color: var(--lime);
  font-weight: 600;
}

.page-contact .contribute__list a {
  color: var(--mist);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contribute__list a:hover,
.page-contact .contribute__list a:focus-visible {
  color: var(--lime);
}

.page-contact .contribute__figure {
  margin: 0;
  border: var(--contact-edge);
  background: var(--navy);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-contact .contribute__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.6) contrast(1.06);
}

/* ---------- 收尾指引 ---------- */
.page-contact .contact-tail {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--moss);
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray);
}

.page-contact .contact-tail a {
  color: var(--mist);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-tail a:hover,
.page-contact .contact-tail a:focus-visible {
  color: var(--lime);
}

/* ---------- 底部色条 ---------- */
.page-contact .contact-strip {
  display: grid;
  grid-template-columns: 3fr 1fr 2fr 1.4fr;
  height: 8px;
  margin-top: 44px;
}

.page-contact .contact-strip span:nth-child(1) { background: var(--lime); }
.page-contact .contact-strip span:nth-child(2) { background: var(--mist); }
.page-contact .contact-strip span:nth-child(3) { background: var(--orange); }
.page-contact .contact-strip span:nth-child(4) { background: var(--violet); }

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .cadence__row {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-contact .flow-block {
    padding: 28px 26px;
  }
}

@media (min-width: 780px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: center;
    gap: 34px;
    padding: 38px 34px;
  }

  .page-contact .contribute__grid {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, .76fr);
    gap: 28px;
    align-items: center;
  }

  .page-contact .flow-block {
    padding: 32px 30px;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-layout {
    grid-template-columns: var(--contact-rail) minmax(0, 1fr);
    gap: 38px;
    align-items: start;
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 124px;
  }

  .page-contact .route {
    padding-right: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .route,
  .page-contact .route__mark,
  .page-contact .route__title,
  .page-contact .flow-index a {
    transition: none;
  }
}