:root, html[data-theme="orbit"] {
  --bg0: #d5e4f0;
  --bg1: #eef5fb;
  --ink: #10202c;
  --muted: #3d5568;
  --line: rgba(16, 58, 88, 0.16);
  --line-strong: rgba(16, 58, 88, 0.34);
  --stamp: #0c7c86;
  --stamp-deep: #085860;
  --pine: #102a3c;
  --gold: #8d5a16;
  --paper-2: rgba(255, 255, 255, 0.72);
  --good: #0c6b48;
  --warn: #8a4e12;
  --shadow: 0 18px 44px rgba(16, 40, 70, 0.1);
  --glow: rgba(12, 150, 170, 0.45);
  --mast: rgba(232, 242, 248, 0.8);
  --input: rgba(255, 255, 255, 0.88);
  --on-pine: #f4fbff;
  --on-pine-dim: #c5d5e2;
  --serif: "Syne", "Outfit", sans-serif;
  --sans: "Outfit", "Avenir Next", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --cjk: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --nav-h: 8rem;
  --max: 1120px;
}

html[data-theme="star"] {
  --bg0: #04060d;
  --bg1: #0a1020;
  --ink: #e8eefc;
  --muted: #a8b6d0;
  --line: rgba(170, 198, 255, 0.16);
  --line-strong: rgba(170, 206, 255, 0.38);
  --stamp: #8adfff;
  --stamp-deep: #e7f7ff;
  --pine: #10182c;
  --gold: #e6c78a;
  --paper-2: rgba(10, 16, 32, 0.72);
  --good: #8ee0b8;
  --warn: #f0c78a;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.38);
  --glow: rgba(120, 190, 255, 0.55);
  --mast: rgba(5, 8, 18, 0.78);
  --input: rgba(8, 12, 24, 0.85);
  --on-pine: #f4fbff;
  --on-pine-dim: #c5d4ea;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html[data-lang="en"] .zh { display: none !important; }
html[data-lang="zh"] .en { display: none !important; }
.zh { font-family: var(--cjk); }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(900px 520px at 88% -8%, var(--glow), transparent 58%),
    radial-gradient(640px 420px at -12% 18%, rgba(90, 130, 255, 0.16), transparent 55%),
    linear-gradient(180deg, var(--bg1), var(--bg0) 42%, var(--bg1));
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.55;
}
html[data-lang="zh"] body { font-family: var(--cjk); }
img { max-width: 100%; }
a { color: var(--stamp-deep); text-underline-offset: 0.18em; }
a:hover { color: var(--stamp); }
:focus-visible { outline: 2px solid var(--stamp); outline-offset: 3px; }
[id] { scroll-margin-top: calc(var(--nav-h) + 1rem); }
code { font-family: var(--mono); font-size: 0.9em; }

#sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.wrap, .mast, footer.colophon, .compare-bar { position: relative; z-index: 1; }

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: var(--bg1);
  padding: 0.5rem 0.8rem;
  z-index: 40;
}
.skip:focus { top: 0.5rem; }

.mast {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--mast);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.mast-inner { max-width: var(--max); margin: 0 auto; padding: 0.65rem 1.25rem 0.5rem; }
.mast-row { display: flex; align-items: center; gap: 0.75rem; }
.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  min-width: max-content;
}
.brand-logo {
  height: 68px;
  width: auto;
  display: block;
}
.brand small {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.tools { margin-left: auto; display: flex; align-items: center; gap: 0.45rem; }
.search-wrap { position: relative; width: 180px; }
.search-wrap input, input[type="number"], input[type="text"], input[type="search"], select {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: var(--input);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.42rem 0.8rem;
  font: inherit;
  font-size: 0.92rem;
}
input[type="number"], select { border-radius: 10px; }
.search-results {
  position: absolute;
  right: 0;
  top: calc(100% + 0.35rem);
  width: min(420px, 80vw);
  background: var(--paper-2);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
  border-radius: 12px;
  display: none;
  max-height: 360px;
  overflow: auto;
  backdrop-filter: blur(16px);
}
.search-results.open { display: block; }
.search-results a {
  display: block;
  padding: 0.65rem 0.85rem;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.search-results a:hover { background: color-mix(in srgb, var(--stamp) 12%, transparent); }
.search-results small { display: block; color: var(--muted); font-family: var(--mono); font-size: 0.72rem; }
.switch {
  display: flex;
  gap: 0.15rem;
  padding: 0.15rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper-2) 80%, transparent);
}
.switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.22rem 0.5rem;
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  white-space: nowrap;
}
.switch button[aria-pressed="true"] { background: var(--pine); color: var(--on-pine); }
html[data-theme="star"] .switch button[aria-pressed="true"] { background: var(--stamp); color: #061018; }
.nav { display: flex; flex-wrap: wrap; gap: 0.15rem; margin-top: 0.4rem; }
.nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 0.18rem 0.48rem;
  border-radius: 999px;
  white-space: nowrap;
}
.nav a[aria-current="page"] { color: var(--on-pine); background: var(--pine); }
html[data-theme="star"] .nav a[aria-current="page"] { background: transparent; color: var(--stamp); box-shadow: inset 0 0 0 1px var(--stamp); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 1.4rem 1.25rem 4rem; }
.edition {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding: 0.4rem 0;
  margin-bottom: 1.3rem;
}

h1, h2, h3 { font-family: var(--serif); font-weight: 700; letter-spacing: -0.03em; line-height: 1.12; }
html[data-lang="zh"] h1, html[data-lang="zh"] h2, html[data-lang="zh"] h3 {
  font-family: var(--cjk);
  font-weight: 700;
  letter-spacing: 0;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); margin: 0.2rem 0 0.8rem; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0 0 0.55rem; }
h3 { font-size: 1.28rem; margin: 0 0 0.35rem; }
.kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stamp);
  margin: 0;
}
html[data-lang="zh"] .kicker { letter-spacing: 0.08em; }
.lede { font-size: 1.18rem; max-width: 44rem; }
.muted { color: var(--muted); }
.small { font-size: 0.92rem; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr;
  gap: 1.4rem;
  align-items: center;
  margin-bottom: 1.6rem;
}
.hero-side { display: grid; gap: 0.8rem; justify-items: center; }
.stat-stack { display: grid; gap: 0.65rem; width: 100%; }
.stat {
  background: color-mix(in srgb, var(--pine) 92%, transparent);
  color: var(--on-pine);
  padding: 0.85rem 1rem;
  border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--stamp) 45%, transparent);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04), 0 10px 30px rgba(0,0,0,0.12);
}
.stat b { display: block; font-family: var(--serif); font-size: 1.5rem; font-weight: 700; }
.stat span { color: var(--on-pine-dim); font-size: 0.88rem; }

.orb { width: 210px; height: 210px; position: relative; }
.orb span, .orb i { position: absolute; border-radius: 50%; }
.orb span { inset: 0; border: 1px solid var(--stamp); }
.orb span:nth-child(1) { animation: spin 22s linear infinite; }
.orb span:nth-child(2) { inset: 22px; border-style: dashed; animation: spin 14s linear infinite reverse; opacity: 0.8; }
.orb span:nth-child(3) { inset: 48px; animation: spin 9s linear infinite; opacity: 0.9; }
.orb b {
  position: absolute; width: 8px; height: 8px; border-radius: 50%;
  background: var(--stamp); top: -4px; left: calc(50% - 4px);
  box-shadow: 0 0 14px var(--glow);
}
.orb i {
  inset: 74px;
  background: radial-gradient(circle, var(--glow), transparent 68%);
  box-shadow: 0 0 36px var(--glow);
}
@keyframes spin { to { transform: rotate(360deg); } }

.section { margin: 2.4rem 0; }
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 1rem;
  padding-bottom: 0.35rem;
}
.num { font-family: var(--mono); color: var(--stamp); font-size: 0.8rem; }

.path-grid, .card-grid, .preset-grid { display: grid; gap: 0.8rem; }
.path-grid { grid-template-columns: repeat(3, 1fr); }
.card-grid, .preset-grid { grid-template-columns: repeat(2, 1fr); }
.card, .path, .preset, .note, .result, .quiz, .toc a, .app, .form-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  backdrop-filter: blur(16px);
}
.path, .card, .preset, .app { padding: 1rem 1.05rem 1.05rem; box-shadow: var(--shadow); }
.path { text-decoration: none; color: inherit; display: block; min-height: 100%; }
.path:hover, .preset:hover, .app:hover { border-color: var(--stamp); }
.path .num { display: block; margin-bottom: 0.3rem; }

.tag, .chip, .ghost, .primary { font: inherit; }
.tag, .chip, .ghost {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.18rem 0.6rem;
  font-size: 0.8rem;
}
button.chip, .preset button, .ghost, .primary, .quiz-opt, .switch button { cursor: pointer; }
button.chip[aria-pressed="true"], .seg button[aria-pressed="true"] {
  background: var(--pine);
  color: var(--on-pine);
  border-color: var(--pine);
}
html[data-theme="star"] button.chip[aria-pressed="true"] {
  background: transparent;
  color: var(--stamp);
  border-color: var(--stamp);
}

.story { display: grid; grid-template-columns: 7.2rem 1fr; gap: 0.8rem; padding: 0.85rem 0; border-bottom: 1px solid var(--line); }
.story time, .when { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); }
.story h3 { font-size: 1.15rem; margin: 0 0 0.2rem; }
.story h3 a { color: inherit; text-decoration: none; }
.story h3 a:hover { color: var(--stamp); }
.live-flag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--good);
  margin-left: 0.4rem;
}

.note, .result, .quiz { padding: 1rem 1.1rem; }
.note.warn { border-color: color-mix(in srgb, var(--warn) 55%, var(--line)); }
.note.good { border-color: color-mix(in srgb, var(--good) 45%, var(--line)); }
.controls, .seg { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.6rem 0 1rem; align-items: center; }
label.field { display: grid; gap: 0.25rem; font-size: 0.92rem; }
label.field > span { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.checks { display: flex; flex-wrap: wrap; gap: 0.45rem 0.9rem; }
.checks label { display: flex; gap: 0.35rem; align-items: center; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: var(--paper-2); backdrop-filter: blur(12px); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 760px; }
th, td { text-align: left; padding: 0.65rem 0.7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  background: color-mix(in srgb, var(--paper-2) 70%, var(--bg1));
  position: sticky;
  top: 0;
}
tr.is-picked { background: color-mix(in srgb, var(--stamp) 14%, transparent); }
.index-num { font-variant-numeric: tabular-nums; font-weight: 650; }

.compare-bar {
  position: sticky;
  bottom: 0.6rem;
  display: none;
  gap: 0.8rem;
  background: var(--pine);
  color: var(--on-pine);
  border-radius: 16px;
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow);
  margin-top: 0.8rem;
  z-index: 5;
  border: 1px solid color-mix(in srgb, var(--stamp) 40%, transparent);
}
.compare-bar.show { display: grid; }
.compare-bar a, .compare-bar .ghost { color: var(--on-pine); border-color: color-mix(in srgb, var(--on-pine) 40%, transparent); }
.compare-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.7rem; }
.pick { font-size: 0.85rem; }

.timeline { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--line-strong); }
.timeline li { padding: 0 0 1.15rem 1rem; position: relative; }
.timeline li::before {
  content: "";
  width: 0.65rem; height: 0.65rem; border-radius: 50%;
  background: var(--stamp);
  box-shadow: 0 0 10px var(--glow);
  position: absolute; left: -0.4rem; top: 0.35rem;
}
.timeline .era { font-family: var(--mono); font-size: 0.75rem; color: var(--gold); }

.advisor { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 1rem; align-items: start; }
.form-card { display: grid; gap: 0.75rem; padding: 1rem; }
.primary {
  background: var(--stamp);
  color: #041018;
  border: 0;
  border-radius: 999px;
  padding: 0.65rem 1rem;
  font-weight: 650;
}
html[data-theme="orbit"] .primary { color: white; }
.primary:hover { filter: brightness(1.08); }
.result h3 { margin-top: 0.8rem; }
.result ul { margin: 0.3rem 0 0.6rem; padding-left: 1.1rem; }
.stack-list { display: grid; gap: 0.45rem; }
.stack-list div { border-top: 1px solid var(--line); padding-top: 0.45rem; }

.toc { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.5rem 0 1rem; }
.toc a { text-decoration: none; color: var(--ink); padding: 0.35rem 0.7rem; border-radius: 999px; font-size: 0.9rem; }
.quiz-opt {
  display: block; width: 100%; text-align: left; margin: 0.4rem 0;
  padding: 0.7rem 0.8rem; border-radius: 12px;
  border: 1px solid var(--line-strong); background: var(--input); color: var(--ink); font: inherit;
}
.quiz-opt:hover { border-color: var(--stamp); }

footer.colophon { border-top: 1px solid var(--line-strong); padding: 1.2rem 0 2rem; color: var(--muted); font-size: 0.9rem; }
.colophon-inner { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.filter-dim { opacity: 0.35; }

@media (max-width: 860px) {
  .hero-grid, .path-grid, .advisor, .card-grid, .preset-grid, .compare-cols { grid-template-columns: 1fr; }
  .brand-logo { height: 54px; }
  .mast-row { flex-wrap: wrap; }
  .nav { flex-wrap: nowrap; overflow-x: auto; }
  .nav a { flex: 0 0 auto; }
  .tools { gap: 0.3rem; }
  .search-wrap { width: 7.2rem; }
  .switch button { padding: 0.2rem 0.38rem; }
  .edition span:last-child { display: none; }
  .story { grid-template-columns: 1fr; gap: 0.15rem; }
  h1 { font-size: 2.05rem; }
  .orb { width: 150px; height: 150px; }
}
@media (prefers-reduced-motion: reduce) {
  .orb span { animation: none; }
  html { scroll-behavior: auto; }
}
@media print {
  #sky, .mast, .tools, .compare-bar, footer.colophon, .no-print, .orb { display: none !important; }
  body { background: white; color: black; }
}