/* ============================================================
   博澳娱乐中心 · /assets/site.css
   共享外壳：reset / tokens / 页头 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body, h1, h2, h3, h4, h5, p, ul, ol, li, dl, dt, dd, figure, blockquote {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

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

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

button { font: inherit; color: inherit; background: none; border: 0; }

table { width: 100%; border-collapse: collapse; }

[hidden] { display: none !important; }

/* ---------- 2. tokens ---------- */
:root {
  --sea-900: #0A2A43;
  --sea-700: #103D5C;
  --sea-500: #1C5A80;
  --mist: #E8EEF2;
  --pearl: #FBF8F3;
  --coral: #FF6B3D;
  --coral-700: #C8410F;
  --gold: #F2A93B;
  --teal: #1FA8A0;
  --teal-700: #0F6E78;
  --ink: #1A1D21;
  --slate: #6B7783;

  --line: rgba(28, 90, 128, 0.42);
  --line-soft: rgba(28, 90, 128, 0.2);
  --line-light: rgba(232, 238, 242, 0.2);
  --grid-line: rgba(28, 90, 128, 0.075);
  --grid-line-deep: rgba(232, 238, 242, 0.055);

  --font-display: "Source Han Sans SC Heavy", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --header-h: 72px;
  --shell: 1180px;
  --shell-wide: 1320px;
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

p { max-width: 34em; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.muted { color: var(--slate); }

:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

/* ---------- 4. skip link ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: -120px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--coral);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  transition: top 0.18s ease-out;
}

.skip-link:focus { top: 14px; }

/* ---------- 5. 容器与纵向节奏 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.shell--wide { max-width: var(--shell-wide); }
.shell--narrow { max-width: 760px; }

.section { padding: 72px 0; }
.section--tight { padding: 40px 0; }

.stack {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.panel-stack {
  display: flex;
  flex-direction: column;
  gap: 72px;
}

/* ---------- 6. 堆叠面板 ---------- */
.panel {
  position: relative;
  background-color: var(--pearl);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  border: 1px solid var(--line);
}

.panel--mist { background-color: var(--mist); }

.panel--deep {
  background-color: var(--sea-900);
  background-image:
    linear-gradient(var(--grid-line-deep) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-deep) 1px, transparent 1px);
  border-color: var(--sea-500);
  color: var(--pearl);
}

.panel--deep .section-title,
.panel--deep .display { color: var(--pearl); }

.panel--deep .section-lead,
.panel--deep p { color: rgba(251, 248, 243, 0.82); }

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px 28px;
  padding: 26px 32px;
  border-bottom: 1px solid var(--line);
}

.panel--deep .panel__head { border-bottom-color: var(--line-light); }

.panel__body { padding: 32px; }
.panel__body--tight { padding: 20px 32px; }

/* ---------- 7. 栅格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 8. 标题与文字构件 ---------- */
.section-index {
  display: block;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 64px;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--coral);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 28px;
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.section-lead {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.7;
  max-width: 32em;
  color: var(--sea-700);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}

.panel--deep .eyebrow { color: var(--gold); }

.rule-line {
  height: 1px;
  background: var(--line);
  border: 0;
}

/* ---------- 9. 按钮与状态标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn--primary {
  background: var(--coral);
  border-color: var(--coral);
  color: #fff;
}

.btn--primary:hover {
  background: var(--coral-700);
  border-color: var(--coral-700);
}

.btn--line {
  background: rgba(251, 248, 243, 0.6);
  border-color: var(--sea-500);
  color: var(--sea-900);
}

.btn--line:hover {
  background: var(--sea-900);
  border-color: var(--sea-900);
  color: var(--pearl);
}

.btn--ghost {
  border-color: rgba(251, 248, 243, 0.45);
  color: var(--pearl);
}

.btn--ghost:hover {
  background: var(--pearl);
  border-color: var(--pearl);
  color: var(--sea-900);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.tag--add { color: var(--coral-700); }
.tag--opt { color: var(--teal-700); }
.tag--fix { color: var(--sea-500); }

.tag--adjust {
  color: var(--ink);
  border-color: var(--gold);
  background: rgba(242, 169, 59, 0.24);
}

/* ---------- 10. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--sea-900);
  color: var(--pearl);
}

.site-header__rule {
  display: block;
  height: 1px;
  background: var(--gold);
  opacity: 0.75;
}

.site-header__inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--shell-wide);
  height: var(--header-h);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 22px;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark__glyph {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--coral);
  background: rgba(255, 107, 61, 0.1);
  color: var(--coral);
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  line-height: 1;
}

.brand-mark__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-mark__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--pearl);
}

.brand-mark__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: rgba(251, 248, 243, 0.48);
}

.service-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: rgba(251, 248, 243, 0.72);
  white-space: nowrap;
}

.service-status__dot {
  width: 7px;
  height: 7px;
  background: var(--coral);
  animation: status-pulse 2.6s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.32; }
}

.site-header__icp {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(251, 248, 243, 0.42);
  white-space: nowrap;
}

.site-header__navwrap {
  display: flex;
  align-items: stretch;
  height: var(--header-h);
}

.site-nav { display: flex; }

.site-nav__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  height: 100%;
}

.site-nav__item { display: flex; }

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 15px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(251, 248, 243, 0.78);
  white-space: nowrap;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 0;
  height: 2px;
  background: transparent;
  transition: background-color 0.18s ease;
}

.site-nav__link:hover {
  color: var(--pearl);
  background: rgba(232, 238, 242, 0.06);
}

.site-nav__link[aria-current="page"] {
  color: var(--coral);
}

.site-nav__link[aria-current="page"]::after { background: var(--coral); }

.site-header__tools {
  display: flex;
  align-items: center;
  margin-left: 14px;
  padding-left: 18px;
  border-left: 1px solid var(--line-light);
}

.ghost-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid rgba(251, 248, 243, 0.35);
  color: rgba(251, 248, 243, 0.88);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.ghost-link:hover {
  background: var(--coral);
  border-color: var(--coral);
  color: #fff;
}

.ghost-link__icon {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
}

.ghost-link:hover .ghost-link__icon { color: #fff; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  height: 36px;
  padding: 0 13px;
  border: 1px solid rgba(251, 248, 243, 0.35);
  color: var(--pearl);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.nav-toggle__bars {
  position: relative;
  width: 14px;
  height: 1px;
  background: var(--pearl);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 14px;
  height: 1px;
  background: var(--pearl);
  transition: transform 0.18s ease, top 0.18s ease, opacity 0.18s ease;
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  background: var(--sea-900);
  border-top: 1px solid var(--gold);
  color: var(--pearl);
}

.site-footer__inner {
  max-width: var(--shell-wide);
  margin: 0 auto;
  padding: 56px 24px 28px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr 1.4fr;
  gap: 0;
}

.site-footer__col {
  padding: 0 32px;
  border-left: 1px solid var(--line-light);
}

.site-footer__col:first-child {
  padding-left: 0;
  border-left: 0;
}

.site-footer__title {
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.site-footer__brand {
  margin-bottom: 18px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--pearl);
}

.footer-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-light);
}

.footer-facts__key {
  font-size: 13px;
  color: rgba(251, 248, 243, 0.58);
}

.footer-facts__value {
  font-size: 13px;
  color: var(--pearl);
}

.site-footer__note {
  margin-top: 18px;
  max-width: 28em;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(251, 248, 243, 0.62);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 20px;
}

.footer-links__item { display: flex; }

.footer-links__link {
  display: inline-block;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  font-size: 14px;
  color: rgba(251, 248, 243, 0.78);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.footer-links__link:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

.footer-contact__item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-light);
}

.footer-contact__key {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(251, 248, 243, 0.55);
}

.footer-contact__value {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(251, 248, 243, 0.88);
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line-light);
}

.site-footer__copy {
  max-width: none;
  font-size: 12.5px;
  color: rgba(251, 248, 243, 0.55);
}

.legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.legal-links__link {
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(251, 248, 243, 0.28);
  font-size: 13px;
  color: rgba(251, 248, 243, 0.72);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.legal-links__link:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.dock-return {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: var(--coral);
  border: 1px solid var(--coral-700);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 12px 26px rgba(10, 42, 67, 0.28);
  transition: background-color 0.18s ease;
}

.dock-return:hover { background: var(--coral-700); }

.dock-return__icon {
  font-family: var(--font-mono);
  font-size: 13px;
}

/* ---------- 12. 滚动进度条（JS 注入） ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 90;
  background: rgba(10, 42, 67, 0.12);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 13. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.breadcrumbs__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumbs__link {
  border-bottom: 1px solid var(--line-soft);
  color: var(--sea-700);
}

.breadcrumbs__link:hover {
  color: var(--coral-700);
  border-bottom-color: var(--coral);
}

.breadcrumbs__sep { color: var(--slate); opacity: 0.6; }

.breadcrumbs__item[aria-current="page"] { color: var(--ink); }

/* ---------- 14. 顶栏目录 ---------- */
.toc-wrap {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  align-self: start;
}

.toc {
  border: 1px solid var(--line);
  border-top: 3px solid var(--coral);
  background: var(--pearl);
}

.toc__title {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--slate);
}

.toc__list { padding: 6px 0; }

.toc__link {
  display: flex;
  gap: 10px;
  padding: 9px 18px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--sea-700);
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.toc__link:hover {
  background: rgba(255, 107, 61, 0.08);
  color: var(--coral-700);
}

.toc__link.is-active {
  border-left-color: var(--coral);
  background: rgba(255, 107, 61, 0.07);
  color: var(--coral-700);
  font-weight: 600;
}

.toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* ---------- 15. 仪表板概览条 ---------- */
.overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  border: 1px solid var(--sea-500);
  background: var(--sea-700);
  color: var(--pearl);
}

.overview__item {
  padding: 22px 24px;
  border-right: 1px solid var(--line-light);
}

.overview__item:last-child { border-right: 0; }

.overview__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--gold);
}

.overview__label {
  margin-top: 6px;
  font-size: 13px;
  color: rgba(232, 238, 242, 0.76);
}

/* ---------- 16. 规则条目卡 ---------- */
.ledger {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  background: var(--pearl);
  border: 1px solid var(--line);
}

.ledger__index {
  display: flex;
  align-items: flex-start;
  padding: 24px;
  border-right: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--coral);
}

.ledger__main { padding: 22px 28px 24px; }

.ledger__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.ledger__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}

.ledger__body {
  margin-top: 10px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: #3C4650;
}

.ledger__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* ---------- 17. 横向时间轴 ---------- */
.timeline {
  position: relative;
  padding: 28px 0 6px;
  overflow-x: auto;
}

.timeline__track {
  position: relative;
  display: flex;
  min-width: 640px;
  padding-top: 26px;
}

.timeline__track::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 5px;
  height: 1px;
  background: var(--sea-500);
}

.timeline__node {
  position: relative;
  flex: 1 1 0;
  padding: 0 18px 0 0;
}

.timeline__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: -26px;
  width: 11px;
  height: 11px;
  background: var(--mist);
  border: 1px solid var(--sea-500);
}

.timeline__node--active::before {
  background: var(--coral);
  border-color: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 107, 61, 0.18);
}

.timeline__version {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--sea-900);
}

.timeline__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--slate);
}

.timeline__cursor {
  position: absolute;
  left: var(--cursor-x, 0);
  top: -32px;
  width: 1px;
  height: 22px;
  background: var(--coral);
}

/* ---------- 18. 数据表 ---------- */
.data-table {
  border: 1px solid var(--line);
  background: var(--pearl);
  font-size: 15px;
}

.data-table th {
  padding: 12px 16px;
  background: var(--sea-700);
  color: var(--pearl);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-align: left;
  white-space: nowrap;
}

.data-table td {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  vertical-align: top;
  line-height: 1.7;
}

.data-table tbody tr:nth-child(even) { background: rgba(15, 110, 120, 0.06); }
.data-table tbody tr:hover { background: rgba(15, 110, 120, 0.14); }

/* ---------- 19. 主题筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 16px 0;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--sea-900);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.filter-btn:hover {
  border-color: var(--coral);
  color: var(--coral-700);
}

.filter-btn[aria-pressed="true"] {
  background: var(--coral);
  border-color: var(--coral);
  color: #fff;
}

.filter-empty {
  padding: 28px 24px;
  border: 1px dashed var(--line);
  font-size: 14px;
  color: var(--slate);
}

[data-filter-item] {
  transition: opacity 0.16s ease, transform 0.16s ease;
}

[data-filter-item].is-out {
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
}

/* ---------- 20. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--sea-500);
  background: var(--sea-700);
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06) brightness(0.86);
}

.media-frame__placeholder {
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(232, 238, 242, 0.09) 0,
    rgba(232, 238, 242, 0.09) 1px,
    transparent 1px,
    transparent 9px
  );
}

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(10, 42, 67, 0) 0%, rgba(10, 42, 67, 0.9) 100%);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(251, 248, 243, 0.86);
}

/* ---------- 21. 局部放大 ---------- */
.detail-zoom {
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--pearl);
}

.detail-zoom__image {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-soft);
  background: var(--sea-700);
  overflow: hidden;
}

.detail-zoom__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* ---------- 22. 卡片 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--pearl);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--coral);
}

.card__head { padding: 20px 22px 0; }

.card__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}

.card__body {
  padding: 12px 22px 22px;
  font-size: 15px;
  line-height: 1.75;
  color: #3C4650;
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 14px;
  margin-top: auto;
  padding: 14px 22px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.group-card {
  position: relative;
  display: block;
  padding: 24px 22px;
  border: 1px solid var(--line);
  background: var(--pearl);
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.group-card:hover {
  transform: scale(1.03);
  border-color: var(--coral);
  background: rgba(255, 107, 61, 0.05);
}

.group-card__count {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 2px 8px;
  border: 1px solid rgba(255, 107, 61, 0.5);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--coral-700);
}

/* ---------- 23. 进入动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.18s ease-out, transform 0.18s ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 24. 响应式 ---------- */
@media (max-width: 1100px) {
  .service-status { display: none; }
  .site-nav__link { padding: 0 11px; font-size: 14px; }
}

@media (max-width: 980px) {
  .grid--8-4,
  .grid--7-5,
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .site-footer__grid { grid-template-columns: 1fr 1fr; row-gap: 36px; }
  .site-footer__col { padding: 0 24px; }
  .site-footer__col:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }
}

@media (max-width: 860px) {
  :root { --header-h: auto; }

  .site-header__inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 16px;
    row-gap: 10px;
  }

  .site-header__brand {
    order: 1;
    flex: 1 1 auto;
    flex-wrap: wrap;
    gap: 8px 16px;
  }

  .site-header__icp { width: 100%; }

  .nav-toggle {
    order: 2;
    display: inline-flex;
  }

  .site-header__navwrap {
    order: 3;
    flex: 0 0 100%;
    width: 100%;
    height: auto;
    flex-direction: column;
    align-items: stretch;
    padding-top: 10px;
    border-top: 1px solid var(--line-light);
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
  }

  .site-nav__list {
    height: auto;
    flex-wrap: nowrap;
    gap: 8px;
    padding: 2px 0 8px;
  }

  .site-nav__link {
    height: 38px;
    padding: 0 14px;
    border: 1px solid rgba(251, 248, 243, 0.28);
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    border-color: var(--coral);
    background: rgba(255, 107, 61, 0.14);
  }

  .site-header__tools {
    margin: 6px 0 0;
    padding: 0;
    border-left: 0;
  }

  .site-header[data-open] .site-nav,
  .site-header[data-open] .site-nav__list { overflow: visible; }

  .site-header[data-open] .site-nav__list {
    flex-wrap: wrap;
    padding-bottom: 2px;
  }

  .section { padding: 48px 0; }
  .panel-stack { gap: 48px; }
  .panel__head { padding: 20px 20px; }
  .panel__body { padding: 22px 20px; }
  .panel__body--tight { padding: 16px 20px; }

  .site-footer__inner { padding: 40px 16px 24px; }
  .dock-return { right: 14px; bottom: 14px; padding: 10px 14px; font-size: 13px; }
}

@media (max-width: 640px) {
  body { font-size: 15px; line-height: 1.7; }

  .grid--8-4,
  .grid--7-5,
  .grid--3,
  .grid--4,
  .grid--2 { grid-template-columns: 1fr; }

  .section-index { font-size: 48px; }
  .section-title { font-size: 22px; }
  .section-lead { font-size: 17px; }

  .site-footer__grid { grid-template-columns: 1fr; }
  .site-footer__col {
    padding: 0 0 0 0;
    border-left: 0;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--line-light);
  }
  .site-footer__col:last-child { border-bottom: 0; padding-bottom: 0; }

  .footer-links { grid-template-columns: 1fr; }
  .footer-contact__item { grid-template-columns: 1fr; gap: 4px; }

  .legal-links { gap: 16px; }

  .ledger { grid-template-columns: 1fr; }
  .ledger__index {
    padding: 16px 20px 0;
    border-right: 0;
    font-size: 26px;
  }
  .ledger__main { padding: 12px 20px 22px; }

  .data-table--stack thead { display: none; }
  .data-table--stack,
  .data-table--stack tbody,
  .data-table--stack tr,
  .data-table--stack td { display: block; width: 100%; }
  .data-table--stack tbody tr {
    border-top: 1px solid var(--line);
    padding: 6px 0;
  }
  .data-table--stack tbody tr:nth-child(even) { background: rgba(15, 110, 120, 0.05); }
  .data-table--stack td {
    border-top: 0;
    padding: 8px 16px;
  }
  .data-table--stack td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 2px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--slate);
  }

  .dock-return__text { display: none; }
  .dock-return { padding: 12px 14px; }
}

/* ---------- 25. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .card:hover,
  .group-card:hover { transform: none; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}