/* ==========================================================================
   RAYBET 版本信息站 — 共享样式表 /assets/site.css
   骨架：口径—参数—业态—版本 四栏对照 · 深靛蓝基底 · 电光青 / 暖琥珀双强调
   ========================================================================== */

:root {
  --font-sans: "思源黑体", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Iosevka", "SFMono-Regular", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;

  --c-ink-indigo: #0B1030;
  --c-indigo-700: #1B2A6B;
  --c-indigo-500: #2F4BD6;
  --c-cyan: #22D3EE;
  --c-cyan-050: #D6F7FB;
  --c-amber: #F2A93B;
  --c-amber-050: #FFE9C7;
  --c-surface: #F5F7FB;
  --c-ink: #0A0D1F;
  --c-ok: #3ED598;
  --c-grey: #6B7280;

  --c-text: #DCE4FF;
  --c-text-dim: #A9B8E6;
  --c-text-soft: #8B9ACB;
  --c-line: rgba(47, 75, 214, 0.55);
  --c-line-cyan: rgba(34, 211, 238, 0.34);

  --radius: 6px;
  --rail-w: 252px;
  --bar-h: 60px;
  --maxw: 1280px;
  --gap: 24px;
}

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd, fieldset, legend { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

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

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

input, select, textarea { font: inherit; color: inherit; }

table { border-collapse: collapse; border-spacing: 0; }

[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

/* --------------------------------------------------------------- body --- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
  background-color: var(--c-ink-indigo);
  background-image:
    radial-gradient(1100px 620px at 88% -10%, rgba(47, 75, 214, 0.44), transparent 62%),
    radial-gradient(760px 540px at 4% 106%, rgba(34, 211, 238, 0.14), transparent 62%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

@media (max-width: 1023.98px) {
  body { padding-top: var(--bar-h); }
}

h1, h2, h3, h4 { line-height: 1.32; letter-spacing: -0.01em; color: #FFFFFF; font-weight: 700; }

::selection { background: var(--c-cyan); color: #04182A; }

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

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

#main-content { scroll-margin-top: 12px; }
@media (max-width: 1023.98px) {
  #main-content { scroll-margin-top: calc(var(--bar-h) + 12px); }
}

/* ------------------------------------------------------------ skip link - */
.skip-link {
  position: fixed;
  top: 8px; left: 8px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--c-cyan);
  color: #04182A;
  font-size: 14px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform 160ms ease;
}
.skip-link:focus { transform: translateY(0); }

/* ============================================================== HEADER == */
.site-header {
  position: fixed;
  z-index: 60;
  background: var(--c-ink-indigo);
  color: var(--c-text);
}

@media (min-width: 1024px) {
  .site-header {
    top: 0; left: 0; bottom: 0;
    width: var(--rail-w);
    border-right: 2px solid var(--c-line-cyan);
  }
}

@media (max-width: 1023.98px) {
  .site-header {
    top: 0; left: 0; right: 0;
    height: var(--bar-h);
    border-bottom: 2px solid var(--c-line-cyan);
  }
}

.header-shell { display: flex; height: 100%; }

@media (min-width: 1024px) {
  .header-shell {
    flex-direction: column;
    gap: 20px;
    padding: 22px 18px 20px;
  }
}

@media (max-width: 1023.98px) {
  .header-shell {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 14px;
  }
}

/* ---- brand ---- */
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  min-width: 0;
}

.brand__mark {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 28px;
  flex: 0 0 auto;
}
.brand__mark > span { display: block; width: 3px; background: var(--c-cyan); }
.brand__mark > span:nth-child(1) { height: 10px; }
.brand__mark > span:nth-child(2) { height: 17px; background: var(--c-amber); }
.brand__mark > span:nth-child(3) { height: 26px; }
.brand__mark > span:nth-child(4) { height: 13px; background: var(--c-amber); }

.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: #FFFFFF;
  white-space: nowrap;
}
.brand__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--c-cyan);
  white-space: nowrap;
}

/* ---- nav toggle ---- */
.nav-toggle { display: none; }

@media (max-width: 1023.98px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 2px solid var(--c-cyan);
    border-radius: var(--radius);
    background: rgba(34, 211, 238, 0.1);
    color: var(--c-cyan);
    font-size: 13px;
    font-weight: 500;
    line-height: 1;
  }
  .nav-toggle__icon { display: grid; gap: 4px; width: 16px; }
  .nav-toggle__icon > span { display: block; height: 2px; background: currentColor; }
  .nav-toggle[aria-expanded="true"] {
    background: var(--c-cyan);
    color: #04182A;
  }
}

/* ---- nav ---- */
.site-nav { display: flex; flex-direction: column; gap: 16px; min-height: 0; }

@media (min-width: 1024px) {
  .site-nav { flex: 1 1 auto; overflow-y: auto; }
  .site-nav::-webkit-scrollbar { width: 6px; }
  .site-nav::-webkit-scrollbar-thumb { background: rgba(34, 211, 238, 0.4); border-radius: 3px; }
}

@media (max-width: 1023.98px) {
  .site-nav {
    position: fixed;
    top: var(--bar-h);
    left: 0; right: 0; bottom: 0;
    z-index: 59;
    padding: 18px 16px 32px;
    overflow-y: auto;
    background: var(--c-ink-indigo);
    border-top: 1px solid rgba(34, 211, 238, 0.2);
    transform: translateX(-100%);
    visibility: hidden;
    transition: transform 200ms ease, visibility 0s linear 200ms;
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform 200ms ease, visibility 0s linear 0s;
  }
}

/* ---- 年份刻度条 ---- */
.site-nav__scale {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--c-line-cyan);
}
.site-nav__scale-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text-soft);
}
.site-nav__scale-track {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 20px;
}
.site-nav__scale-track > span { flex: 1 1 0; background: rgba(34, 211, 238, 0.34); height: 8px; }
.site-nav__scale-track > span:nth-child(2) { height: 11px; }
.site-nav__scale-track > span:nth-child(3) { height: 14px; }
.site-nav__scale-track > span:nth-child(4) { height: 17px; }
.site-nav__scale-track > span:nth-child(5) { height: 20px; background: var(--c-cyan); }
.site-nav__scale-track > span:nth-child(6) { height: 15px; background: var(--c-amber); }
.site-nav__scale-range {
  font-size: 11px;
  color: var(--c-text-soft);
}

/* ---- 导航列表 ---- */
.site-nav__list { display: flex; flex-direction: column; gap: 2px; }

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px 10px 15px;
  border-radius: var(--radius);
  font-size: 14.5px;
  color: var(--c-text-dim);
  transition: background 140ms ease, color 140ms ease;
}
.site-nav__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 62%;
  border-radius: 2px;
  background: var(--c-cyan);
  transform: translateY(-50%) scaleY(0);
  transition: transform 160ms ease;
}
.site-nav__link:hover { background: rgba(47, 75, 214, 0.34); color: #FFFFFF; }
.site-nav__link[aria-current="page"] { background: rgba(34, 211, 238, 0.14); color: #FFFFFF; }
.site-nav__link[aria-current="page"]::before { transform: translateY(-50%) scaleY(1); }

.site-nav__idx { flex: 0 0 auto; font-size: 11px; color: var(--c-text-soft); }
.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--c-cyan); }
.site-nav__label { flex: 1 1 auto; }

.site-nav__foot {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed var(--c-line-cyan);
}
.site-nav__note { font-size: 11.5px; line-height: 1.65; color: var(--c-text-soft); }

/* ---- 滚动进度 ---- */
.scroll-progress {
  position: fixed;
  left: 0; right: 0;
  top: var(--bar-h);
  height: 3px;
  z-index: 55;
  pointer-events: none;
  background: rgba(34, 211, 238, 0.12);
}
.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-amber));
  transition: width 80ms linear;
}
@media (min-width: 1024px) {
  .scroll-progress { top: 0; left: var(--rail-w); }
}

/* ============================================================== FOOTER == */
.site-footer {
  margin-top: 72px;
  background: var(--c-ink-indigo);
  border-top: 2px solid var(--c-line-cyan);
  color: var(--c-text-dim);
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 52px 24px 34px;
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 768px) and (max-width: 1023.98px) {
  .footer-inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px 24px;
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .footer-inner {
    grid-template-columns: 2.2fr 1fr 1fr 1fr 2.4fr;
    gap: 28px;
  }
}

.footer-brand__name {
  font-size: 18px;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.01em;
}
.footer-brand__tag {
  margin-top: 7px;
  font-size: 12px;
  color: var(--c-cyan);
}
.footer-brand__signoff {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--c-text-soft);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 700;
  color: #FFFFFF;
}
.footer-col__title::before {
  content: "";
  width: 14px;
  height: 2px;
  background: var(--c-cyan);
  flex: 0 0 auto;
}

.footer-col__list { display: flex; flex-direction: column; gap: 9px; }
.footer-col__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--c-text-dim);
  transition: color 140ms ease;
}
.footer-col__list a::before {
  content: "";
  width: 5px;
  height: 5px;
  flex: 0 0 auto;
  background: rgba(34, 211, 238, 0.5);
  transition: background 140ms ease;
}
.footer-col__list a:hover { color: var(--c-cyan); }
.footer-col__list a:hover::before { background: var(--c-amber); }

.footer-contact {
  padding: 18px 18px 16px;
  border: 2px solid rgba(242, 169, 59, 0.42);
  border-radius: var(--radius);
  background: rgba(27, 42, 107, 0.55);
}
.footer-contact__title {
  margin-bottom: 12px;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-amber);
}
.footer-contact__list { display: flex; flex-direction: column; gap: 8px; }
.footer-contact__list li { display: flex; gap: 10px; align-items: baseline; font-size: 12.5px; }
.footer-contact__k { flex: 0 0 32px; font-size: 11px; color: var(--c-text-soft); }
.footer-contact__v { flex: 1 1 auto; color: var(--c-text); word-break: break-word; }
.footer-contact__note {
  margin-top: 13px;
  padding-top: 12px;
  border-top: 1px dashed rgba(242, 169, 59, 0.34);
  font-size: 11.5px;
  line-height: 1.7;
  color: #C9B38F;
}

.footer-base {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px 26px;
  border-top: 1px solid rgba(34, 211, 238, 0.18);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 22px;
  font-size: 12px;
  color: var(--c-text-soft);
}
.footer-base__icp { letter-spacing: 0.02em; }
.footer-base__copy { color: var(--c-text-soft); }
.footer-base__top {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border: 2px solid rgba(34, 211, 238, 0.45);
  border-radius: var(--radius);
  font-size: 12.5px;
  color: var(--c-cyan);
  transition: background 140ms ease, border-color 140ms ease;
}
.footer-base__top:hover { background: rgba(34, 211, 238, 0.14); border-color: var(--c-cyan); }

/* ============================================================ COMPONENTS */
/* ---- 容器与节奏 ---- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
}
@media (min-width: 768px) {
  .container { padding: 0 24px; }
}

.container--narrow { max-width: 880px; }

.section { padding: 52px 0; }
.section--tight { padding: 32px 0; }
@media (min-width: 1024px) {
  .section { padding: 64px 0; }
  .section--tight { padding: 38px 0; }
}

/* ---- 网格 ---- */
.grid { display: grid; gap: var(--gap); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: minmax(0, 1fr); }
.grid--3 { grid-template-columns: minmax(0, 1fr); }
.grid--4 { grid-template-columns: minmax(0, 1fr); }

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ---- 章节标题组 ---- */
.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 74ch;
  margin-bottom: 28px;
}
.section-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.section-eyebrow::after {
  content: "";
  flex: 0 1 120px;
  height: 1px;
  background: rgba(34, 211, 238, 0.42);
}
.section-title {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  color: #FFFFFF;
}
.section-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-text-dim);
}

/* ---- 面板 ---- */
.panel {
  padding: 22px;
  border-radius: var(--radius);
  border: 2px solid var(--c-line);
  background: rgba(27, 42, 107, 0.5);
  color: var(--c-text);
}
.panel--surface {
  background: var(--c-surface);
  border-color: #D3DBEC;
  color: var(--c-ink);
}
.panel--warm {
  background: var(--c-amber-050);
  border-color: var(--c-amber);
  color: #3A2405;
}
.panel--cyan {
  background: var(--c-cyan-050);
  border-color: var(--c-cyan);
  color: #052B36;
}
.panel--focus { box-shadow: 4px 4px 0 0 rgba(34, 211, 238, 0.6); }
.panel--warm.panel--focus { box-shadow: 4px 4px 0 0 rgba(242, 169, 59, 0.5); }
.panel--cyan.panel--focus { box-shadow: 4px 4px 0 0 rgba(47, 75, 214, 0.45); }

/* ---- 长文排版 ---- */
.prose { font-size: 16px; line-height: 1.85; }
.prose > * + * { margin-top: 16px; }
.prose h2 { margin-top: 34px; font-size: 23px; }
.prose h3 { margin-top: 26px; font-size: 19px; }
.prose ul,
.prose ol { padding-left: 1.35em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 8px; }
.prose strong { color: #FFFFFF; font-weight: 700; }
.prose--light { color: var(--c-ink); }
.prose--light strong { color: var(--c-ink); }
.prose--light h2,
.prose--light h3 { color: var(--c-ink); }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  text-align: center;
  transition: transform 140ms ease, box-shadow 140ms ease,
              background 140ms ease, color 140ms ease, border-color 140ms ease;
}
.btn--cyan {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: #04182A;
  box-shadow: 4px 4px 0 0 rgba(242, 169, 59, 0.85);
}
.btn--cyan:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 0 rgba(242, 169, 59, 0.92); }
.btn--amber {
  background: var(--c-amber);
  border-color: var(--c-amber);
  color: #3A2405;
  box-shadow: 4px 4px 0 0 rgba(34, 211, 238, 0.7);
}
.btn--amber:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 0 rgba(34, 211, 238, 0.8); }
.btn--ghost {
  background: transparent;
  border-color: rgba(207, 219, 255, 0.45);
  color: #CFDBFF;
}
.btn--ghost:hover { border-color: var(--c-cyan); color: var(--c-cyan); }
.btn--block { width: 100%; }
.btn--sm { padding: 7px 13px; font-size: 13px; }

/* ---- 标记 ---- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid currentColor;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.tag--cyan { color: var(--c-cyan); }
.tag--amber { color: var(--c-amber); }
.tag--ok { color: var(--c-ok); }
.tag--grey { color: var(--c-text-soft); }

/* ---- 面包屑 ---- */
.breadcrumb { padding: 20px 0 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--c-text-soft);
}
.breadcrumb__link { color: #9FB0E0; transition: color 140ms ease; }
.breadcrumb__link:hover { color: var(--c-cyan); }
.breadcrumb__sep { color: rgba(34, 211, 238, 0.6); }
.breadcrumb__current { color: #E8EDFF; }

/* ---- 标签页 ---- */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  background: rgba(11, 16, 48, 0.62);
}
.tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-left: 3px solid transparent;
  border-radius: 4px;
  font-size: 13.5px;
  color: var(--c-text-dim);
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease;
}
.tab:hover { background: rgba(47, 75, 214, 0.4); color: #FFFFFF; }
.tab[aria-selected="true"] {
  background: var(--c-cyan);
  border-left-color: var(--c-amber);
  color: #04182A;
  font-weight: 700;
}
.tabs--light { background: #FFFFFF; border-color: #C9D4EA; }
.tabs--light .tab { color: #3B4A72; }
.tabs--light .tab:hover { background: #E8EEFB; color: #17224A; }
.tabs--light .tab[aria-selected="true"] {
  background: var(--c-indigo-500);
  color: #FFFFFF;
  border-left-color: var(--c-amber);
}

/* ---- 折叠面板 ---- */
.accordion {
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  background: rgba(11, 16, 48, 0.5);
  overflow: hidden;
}
.accordion__item + .accordion__item { border-top: 1px solid rgba(47, 75, 214, 0.5); }
.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  text-align: left;
  font-size: 15px;
  color: #E8EDFF;
  transition: background 140ms ease;
}
.accordion__trigger:hover { background: rgba(34, 211, 238, 0.09); }
.accordion__sign {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
}
.accordion__sign::before,
.accordion__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-cyan);
}
.accordion__sign::before { width: 12px; height: 2px; transform: translate(-50%, -50%); }
.accordion__sign::after {
  width: 2px;
  height: 12px;
  transform: translate(-50%, -50%);
  transition: transform 160ms ease;
}
.accordion__trigger[aria-expanded="true"] .accordion__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
}
.accordion__panel {
  padding: 0 18px 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: #C3CFF5;
}

/* ---- 数据表 ---- */
.table-wrap {
  overflow-x: auto;
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  background: rgba(11, 16, 48, 0.5);
}
.data-table { width: 100%; min-width: 600px; font-size: 14px; }
.data-table caption {
  caption-side: top;
  padding: 14px 16px 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--c-cyan);
}
.data-table th,
.data-table td {
  padding: 11px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(47, 75, 214, 0.35);
}
.data-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #141C48;
  color: #FFFFFF;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.data-table tbody tr:nth-child(even) { background: rgba(27, 42, 107, 0.35); }
.data-table tbody tr:hover { background: rgba(34, 211, 238, 0.12); }
.data-table tbody tr:nth-child(even):hover { background: rgba(34, 211, 238, 0.16); }
.data-table .mono { font-size: 13.5px; }
.panel--surface .data-table thead th { background: var(--c-indigo-700); }

/* ---- 表格筛选输入 ---- */
.filter-input {
  width: 100%;
  max-width: 320px;
  padding: 9px 14px;
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  background: rgba(11, 16, 48, 0.6);
  color: var(--c-text);
  font-size: 14px;
  transition: border-color 140ms ease;
}
.filter-input::placeholder { color: var(--c-text-soft); }
.filter-input:focus { border-color: var(--c-cyan); outline: none; }
.filter-count { font-family: var(--font-mono); font-size: 12.5px; color: var(--c-cyan); }

/* ---- 复制按钮 ---- */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px dashed rgba(34, 211, 238, 0.6);
  border-radius: 4px;
  background: rgba(34, 211, 238, 0.08);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-cyan);
  transition: background 140ms ease, border-color 140ms ease, color 140ms ease;
}
.copy-btn:hover { background: rgba(34, 211, 238, 0.2); }
.copy-btn[data-copied="true"] {
  color: var(--c-ok);
  border-color: var(--c-ok);
  border-style: solid;
}

/* ---- 图片容器 ---- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  background-color: #101740;
  background-image:
    linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(11, 16, 48, 0.9)),
    repeating-linear-gradient(90deg, rgba(34, 211, 238, 0.09) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(0deg, rgba(34, 211, 238, 0.09) 0 1px, transparent 1px 46px);
}
.media-frame > img,
.media-frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--map { aspect-ratio: 4 / 3; }
.media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-text-soft);
}

/* ---- 显现动画 ---- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 260ms ease, transform 260ms ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---- 链接文字 ---- */
.link-cyan {
  color: var(--c-cyan);
  border-bottom: 1px solid rgba(34, 211, 238, 0.45);
  transition: border-color 140ms ease, color 140ms ease;
}
.link-cyan:hover { border-color: var(--c-amber); color: var(--c-amber); }

/* ------------------------------------------------- accessibility / motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .skip-link { transition: none; }
}