/**
 * [INPUT]: 依赖 site-01-bureau 的 HTML 结构命名、script.js 的状态类和第一章视觉规范
 * [OUTPUT]: 对外提供官网主页与 404 页的完整政务站点样式
 * [POS]: site-01-bureau 的共享样式层，统一政务伪装外观和隐藏信息呈现
 * [PROTOCOL]: 变更时更新此头部，然后检查 AGENTS.md
 */

/* ===== 第一章基础视觉令牌 ===== */
:root {
  --bureau-primary: #1b4f8c;
  --bureau-primary-dark: #163c69;
  --bureau-accent: #d6b25e;
  --bureau-surface: #f5f5f5;
  --bureau-panel: #ffffff;
  --bureau-line: #d4dde8;
  --bureau-text: #1c2430;
  --bureau-muted: #617084;
  --bureau-shadow: 0 18px 40px rgba(14, 37, 69, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Songti SC", "SimSun", "Microsoft YaHei", sans-serif;
  color: var(--bureau-text);
  background:
    linear-gradient(180deg, #edf2f8 0, #f5f5f5 220px, #f7f7f7 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(transparent 0, rgba(27, 79, 140, 0.015) 100%),
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 79px,
      rgba(27, 79, 140, 0.03) 80px
    );
  opacity: 0.45;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
ul,
dl {
  margin: 0;
}

.bureau-shell,
.top-strip__inner,
.bureau-header__inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.top-strip {
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  background: var(--bureau-primary-dark);
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
}

.alert-strip {
  border-bottom: 1px solid #d6dfeb;
  background: linear-gradient(180deg, #fffdf6, #f8f4e7);
  color: #70541f;
  font-size: 14px;
}

.alert-strip__inner {
  display: flex;
  gap: 8px;
  padding: 10px 0;
}

.top-strip__inner {
  display: flex;
  justify-content: flex-end;
  gap: 20px;
  padding: 10px 0;
}

.bureau-header {
  background:
    linear-gradient(135deg, rgba(12, 31, 57, 0.12), rgba(12, 31, 57, 0)),
    var(--bureau-primary);
  color: #fff;
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

.bureau-header--compact {
  position: sticky;
  top: 0;
  z-index: 20;
}

.bureau-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0 24px;
}

.bureau-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.bureau-brand__eyebrow {
  font-size: 12px;
  letter-spacing: 0.14em;
  opacity: 0.72;
}

.bureau-brand h1 {
  margin-top: 4px;
  font-size: clamp(30px, 5vw, 40px);
  line-height: 1.12;
}

.bureau-brand__meta {
  margin-top: 8px;
  font-size: 14px;
  opacity: 0.84;
}

.bureau-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.bureau-nav a {
  position: relative;
  padding: 12px 16px 14px;
  font-size: 14px;
  white-space: nowrap;
  transition:
    background-color 160ms ease,
    color 160ms ease;
}

.bureau-nav a + a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  bottom: 11px;
  width: 1px;
  background: rgba(255, 255, 255, 0.18);
}

.bureau-nav a:hover {
  background: rgba(255, 255, 255, 0.08);
}

.bureau-nav a.is-active {
  background: rgba(255, 255, 255, 0.08);
}

.bureau-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -1px;
  height: 3px;
  background: var(--bureau-accent);
}

.hero {
  padding: 32px 0 18px;
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.9fr);
  gap: 24px;
}

.hero__content,
.hero__panel,
.notice-card,
.stat-card,
.contact-form,
.error-card {
  border: 1px solid var(--bureau-line);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--bureau-shadow);
}

.hero__content {
  padding: 38px;
  background:
    radial-gradient(circle at top right, rgba(214, 178, 94, 0.18), transparent 32%),
    linear-gradient(180deg, #ffffff, #f5f8fc);
}

.hero__crumb {
  margin-bottom: 16px;
  color: var(--bureau-muted);
  font-size: 13px;
}

.section-kicker {
  color: var(--bureau-primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h2,
.section-heading h2,
.error-card h1 {
  font-size: clamp(28px, 4.2vw, 42px);
  line-height: 1.18;
}

.hero__lead,
.notice-card p,
.project-copy p,
.timeline-card p,
.contact-form span,
.error-card p {
  line-height: 1.8;
}

.hero__lead,
.project-copy,
.timeline-card p,
.last-update,
.footer-meta,
.meta-list,
.signature,
.form-feedback,
.error-clue {
  color: var(--bureau-muted);
}

.hero__actions,
.contact-form__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.button--primary {
  background: var(--bureau-primary);
  color: #fff;
}

.button--ghost {
  border-color: var(--bureau-line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--bureau-primary);
}

.button:focus-visible,
.bureau-nav a:focus-visible,
.contact-form input:focus-visible,
.contact-form textarea:focus-visible,
.text-link:focus-visible {
  outline: 2px solid var(--bureau-accent);
  outline-offset: 3px;
}

.hero__ticker {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 18px;
  color: var(--bureau-muted);
  font-size: 13px;
}

.hero__ticker span {
  padding: 7px 10px;
  border: 1px solid #dde6f0;
  background: rgba(245, 248, 252, 0.9);
}

.hero__panel {
  padding: 30px 26px;
  background: linear-gradient(180deg, #fafdff, #eef4fb);
}

.hero__panel h3 {
  font-size: 20px;
}

.fact-list {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.fact-list div {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--bureau-line);
}

.fact-list dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bureau-muted);
}

.fact-list dd {
  margin-top: 8px;
  font-size: 20px;
  font-weight: 700;
}

.notice-grid,
.personnel-banner,
.overview-section,
.updates-section,
.project-section,
.contact-section,
.error-page {
  padding-top: 18px;
  padding-bottom: 18px;
}

.notice-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.8fr);
  gap: 20px;
}

.personnel-banner__inner {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: 18px;
  padding: 24px 26px;
  border: 1px solid #d9dfc8;
  background:
    linear-gradient(180deg, rgba(251, 249, 239, 0.98), rgba(245, 247, 236, 0.96));
  box-shadow: var(--bureau-shadow);
}

.personnel-banner__body {
  display: grid;
  gap: 12px;
  line-height: 1.8;
}

.personnel-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--bureau-muted);
  font-size: 14px;
}

.section-heading--tight {
  margin-bottom: 16px;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.contact-result__lead,
.backup-card small {
  color: var(--bureau-muted);
}

.contact-result {
  margin-top: 18px;
  padding: 24px;
  border: 1px solid var(--bureau-line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 248, 252, 0.96));
  box-shadow: var(--bureau-shadow);
}

.contact-result h3 {
  margin-top: 10px;
  font-size: 24px;
  line-height: 1.3;
}

.backup-links {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.backup-card {
  display: grid;
  gap: 6px;
  padding: 16px;
  border: 1px solid #d9e3ef;
  background: #f8fbfe;
  transition:
    transform 140ms ease,
    border-color 140ms ease,
    background-color 140ms ease;
}

.backup-card span {
  color: var(--bureau-primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.backup-card strong {
  font-size: 20px;
  line-height: 1.25;
}

.backup-card:hover,
.backup-card:focus-visible {
  transform: translateY(-1px);
  border-color: #b8c9dc;
  background: #eef4fb;
}

.overview-card {
  padding: 24px;
  border: 1px solid var(--bureau-line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 248, 252, 0.96));
  box-shadow: var(--bureau-shadow);
}

.overview-card h3 {
  margin-top: 10px;
  font-size: 22px;
  line-height: 1.35;
}

.meta-list--compact {
  display: grid;
  gap: 10px;
  padding-left: 18px;
}

.quick-links {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.quick-links a {
  padding: 12px 14px;
  border: 1px solid #d9e3ef;
  background: #f8fbfe;
  color: var(--bureau-primary);
  font-weight: 700;
  transition:
    transform 140ms ease,
    background-color 140ms ease,
    border-color 140ms ease;
}

.quick-links a:hover,
.quick-links a:focus-visible {
  border-color: #b8c9dc;
  background: #eef4fb;
  transform: translateX(2px);
}

.notice-card {
  padding: 26px;
}

.notice-card--featured {
  grid-row: span 2;
}

.notice-card h2,
.notice-card h3,
.timeline-card h3 {
  margin-top: 10px;
  font-size: 24px;
  line-height: 1.35;
}

.meta-list {
  padding-left: 18px;
  margin-top: 18px;
}

.signature {
  margin-top: 22px;
  font-family: "KaiTi", "STKaiti", serif;
  font-size: 18px;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.text-link {
  color: var(--bureau-primary);
  font-weight: 700;
}

.project-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 22px;
}

.project-copy {
  display: grid;
  gap: 16px;
  padding: 28px;
  border: 1px solid var(--bureau-line);
  background: var(--bureau-panel);
  box-shadow: var(--bureau-shadow);
}

.project-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.project-tag-row span {
  padding: 7px 10px;
  border: 1px solid #d9e2ed;
  background: #f6f9fc;
  color: var(--bureau-primary);
  font-size: 13px;
}

.project-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.stat-card,
.timeline-card {
  padding: 24px;
}

.stat-card strong {
  display: block;
  color: var(--bureau-primary);
  font-size: 30px;
}

.stat-card span {
  display: block;
  margin-top: 8px;
  color: var(--bureau-muted);
}

.updates-timeline {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 150px;
}

.updates-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 118px;
  width: 1px;
  background: linear-gradient(180deg, rgba(27, 79, 140, 0.12), rgba(27, 79, 140, 0.34));
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 112px;
  width: 13px;
  height: 13px;
  border: 2px solid #9db3cf;
  border-radius: 50%;
  background: #fff;
}

.timeline-date {
  display: inline-block;
  padding-top: 4px;
  color: var(--bureau-primary);
  font-size: 13px;
  font-weight: 700;
}

.timeline-card {
  border: 1px solid var(--bureau-line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 248, 252, 0.96));
  box-shadow: var(--bureau-shadow);
}

.timeline-card h3 {
  font-size: 24px;
  line-height: 1.35;
}

.timeline-card p {
  margin-top: 10px;
  color: var(--bureau-muted);
  line-height: 1.8;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 24px;
}

.contact-form__note {
  grid-column: 1 / -1;
  padding: 12px 14px;
  border: 1px dashed #d2dceb;
  background: #f8fbff;
  color: var(--bureau-muted);
  font-size: 14px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  font-size: 14px;
}

.contact-form__full {
  grid-column: 1 / -1;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #c8d4e2;
  background: #fff;
  font: inherit;
  color: var(--bureau-text);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    background-color 160ms ease;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: #7e99b8;
  box-shadow: 0 0 0 4px rgba(27, 79, 140, 0.08);
  background: #fcfeff;
}

.form-feedback[data-state="error"] {
  color: #b24a2c;
}

.form-feedback[data-state="idle"] {
  color: var(--bureau-muted);
}

.bureau-footer {
  margin-top: 36px;
  border-top: 1px solid #cad7e5;
  background: #eef3f8;
}

.bureau-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 20px;
  padding-bottom: 12px;
  font-size: 14px;
}

.footer-meta {
  text-align: right;
}

.hidden-trace {
  padding-bottom: 24px;
  color: #efebeb;
  background: #efefef;
  line-height: 1.6;
  user-select: text;
  cursor: text;
}

.error-page {
  min-height: calc(100vh - 188px);
  display: grid;
  place-items: center;
}

.error-card {
  width: min(720px, 100%);
  padding: 36px;
  text-align: center;
}

.error-card h1 {
  margin-top: 14px;
}

.error-card .button {
  margin-top: 22px;
}

.error-clue {
  margin-top: 18px;
  font-size: 13px;
  letter-spacing: 0.08em;
}

@media (max-width: 900px) {
  .bureau-header__inner,
  .section-heading,
  .bureau-footer__inner,
  .hero__inner,
  .project-layout {
    grid-template-columns: 1fr;
    display: grid;
  }

  .bureau-footer__inner,
  .footer-meta {
    text-align: left;
  }

  .notice-grid,
  .personnel-banner__inner,
  .overview-grid,
  .project-stats,
  .contact-form {
    grid-template-columns: 1fr;
  }

  .notice-card--featured {
    grid-row: auto;
  }
}

@media (max-width: 640px) {
  .bureau-shell,
  .top-strip__inner,
  .bureau-header__inner {
    width: min(100% - 24px, 1120px);
  }

  .top-strip__inner {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 8px 14px;
  }

  .alert-strip__inner {
    display: block;
    line-height: 1.7;
  }

  .bureau-header__inner,
  .bureau-brand,
  .bureau-nav {
    align-items: flex-start;
  }

  .bureau-nav {
    justify-content: flex-start;
    border-bottom: 0;
  }

  .hero__content,
  .hero__panel,
  .notice-card,
  .project-copy,
  .stat-card,
  .timeline-card,
  .contact-form,
  .error-card {
    padding: 20px;
  }

  .updates-timeline {
    padding-left: 0;
  }

  .updates-timeline::before {
    left: 6px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-left: 26px;
  }

  .timeline-item::before {
    left: 0;
  }

  .hero h2,
  .section-heading h2,
  .error-card h1 {
    font-size: 28px;
  }

  .bureau-nav a {
    padding-left: 0;
    padding-right: 18px;
  }

  .bureau-nav a + a::before {
    display: none;
  }

  .bureau-nav a.is-active::after {
    left: 0;
    right: 18px;
  }
}