:root {
  --bg: #08131c;
  --bg-soft: #102231;
  --bg-card: rgba(12, 24, 35, 0.8);
  --bg-card-2: rgba(17, 32, 46, 0.76);
  --text: #f7f2e8;
  --muted: #c8bfad;
  --gold: #e8c07d;
  --gold-soft: #f5d89f;
  --cyan: #7fd6d0;
  --cyan-strong: #58e7d8;
  --ember: #ff8b57;
  --jade: #8fdd9f;
  --violet: #9ca7ff;
  --line: rgba(255, 240, 214, 0.11);
  --line-strong: rgba(255, 240, 214, 0.18);
  --shadow: 0 26px 72px rgba(0, 0, 0, 0.34);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --wrap: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font: 16px/1.68 "Segoe UI Variable Display", "Microsoft YaHei UI", "PingFang SC", sans-serif;
  background:
    radial-gradient(circle at 14% 12%, rgba(127, 214, 208, 0.14), transparent 24%),
    radial-gradient(circle at 82% 10%, rgba(255, 139, 87, 0.14), transparent 26%),
    radial-gradient(circle at 50% 90%, rgba(232, 192, 125, 0.12), transparent 28%),
    linear-gradient(180deg, #071019, #09131c 38%, #08111a);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  width: 32rem;
  height: 32rem;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.18;
  z-index: -2;
  pointer-events: none;
}

body::before {
  top: -12rem;
  right: -7rem;
  background: linear-gradient(135deg, rgba(232, 192, 125, 0.7), rgba(127, 214, 208, 0.08));
}

body::after {
  left: -8rem;
  bottom: -12rem;
  background: linear-gradient(135deg, rgba(255, 139, 87, 0.55), rgba(127, 214, 208, 0.08));
}

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

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

.container {
  width: min(calc(100% - 32px), var(--wrap));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(7, 16, 25, 0.94), rgba(7, 16, 25, 0.64));
}

.site-header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #0e1720;
  font: 700 1rem/1 "Bahnschrift", "Segoe UI Variable Display", sans-serif;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--gold-soft), var(--cyan));
  box-shadow: 0 14px 26px rgba(95, 231, 216, 0.18);
}

.brand-copy strong {
  display: block;
  font: 700 1.02rem/1 "Bahnschrift", "Segoe UI Variable Display", sans-serif;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.brand-copy span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.main-nav,
.sub-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.main-nav {
  justify-content: flex-end;
}

.main-nav a,
.sub-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: rgba(247, 242, 232, 0.84);
  transition: 0.25s ease;
}

.main-nav a:hover,
.sub-nav a:hover {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  transform: translateY(-1px);
}

.main-nav a.is-active,
.sub-nav a.is-active {
  color: var(--text);
  border-color: rgba(255, 240, 214, 0.18);
  background: rgba(255, 255, 255, 0.07);
}

.sub-nav-wrap {
  padding: 10px 0 0;
}

.page {
  padding: 38px 0 48px;
}

.hero,
.card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-card-2), var(--bg-card));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero {
  position: relative;
  padding: 34px;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 12% 12%, rgba(255, 255, 255, 0.1), transparent 22%),
    linear-gradient(135deg, rgba(232, 192, 125, 0.18), rgba(95, 231, 216, 0.06) 42%, transparent 76%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.82fr);
  gap: 28px;
}

.hero-side {
  display: grid;
  gap: 16px;
}

.eyebrow {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--gold-soft);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin: 0;
}

h1 {
  margin-top: 18px;
  font: 700 clamp(2.8rem, 7vw, 5rem)/0.96 "Bahnschrift", "Segoe UI Variable Display", sans-serif;
  letter-spacing: 0.03em;
}

h1 small {
  display: block;
  margin-top: 12px;
  color: var(--cyan);
  font: 500 clamp(1.02rem, 2vw, 1.28rem)/1.45 "Segoe UI Variable Display", "Microsoft YaHei UI", sans-serif;
  letter-spacing: 0.08em;
}

h2 {
  font: 700 clamp(1.5rem, 2.5vw, 2.2rem)/1.14 "Bahnschrift", "Segoe UI Variable Display", sans-serif;
  letter-spacing: 0.04em;
}

h3 {
  font-size: 1.08rem;
  letter-spacing: 0.02em;
}

p {
  margin: 0;
}

.muted,
.card p,
.hero p,
.section-head p {
  color: var(--muted);
}

.lead {
  max-width: 68ch;
  font-size: 1.04rem;
}

.card {
  padding: 22px;
  border-radius: var(--radius-lg);
}

.panel-grid-2,
.panel-grid-3,
.panel-grid-4,
.wiki-grid,
.metric-grid,
.split-grid,
.timeline-grid {
  display: grid;
  gap: 18px;
}

.panel-grid-4,
.metric-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.panel-grid-3,
.wiki-grid,
.timeline-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel-grid-2,
.split-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.section {
  padding: 34px 0 10px;
}

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.metric {
  position: relative;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(15, 29, 43, 0.75), rgba(9, 18, 28, 0.84));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.metric::after {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -38%;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent 64%);
}

.metric strong {
  display: block;
  margin-bottom: 8px;
  color: var(--gold-soft);
  font: 700 clamp(1.8rem, 2.8vw, 2.4rem)/1 "Bahnschrift", "Segoe UI Variable Display", sans-serif;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.94rem;
}

.tag-row,
.button-row,
.code-row,
.file-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag,
.file-chip,
.code-chip,
.pill {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.tag strong,
.pill strong {
  color: var(--gold-soft);
}

.tag.hot {
  color: #ffe8be;
  border-color: rgba(232, 192, 125, 0.24);
  background: rgba(232, 192, 125, 0.08);
}

.tag.cool {
  color: #cafbf6;
  border-color: rgba(95, 231, 216, 0.24);
  background: rgba(95, 231, 216, 0.08);
}

.tag.fire {
  color: #ffd1c3;
  border-color: rgba(255, 139, 87, 0.24);
  background: rgba(255, 139, 87, 0.08);
}

.tag.jade {
  color: #d6f8dd;
  border-color: rgba(143, 221, 159, 0.24);
  background: rgba(143, 221, 159, 0.08);
}

.tag.violet {
  color: #dfe2ff;
  border-color: rgba(156, 167, 255, 0.24);
  background: rgba(156, 167, 255, 0.08);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 600;
  transition: 0.25s ease;
}

.button.primary {
  color: #111b20;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  box-shadow: 0 16px 32px rgba(232, 192, 125, 0.28);
}

.button.secondary {
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.button:hover {
  transform: translateY(-2px);
}

.kicker {
  display: inline-block;
  margin-bottom: 10px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--cyan);
  background: rgba(95, 231, 216, 0.08);
  border: 1px solid rgba(95, 231, 216, 0.16);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card ul,
.card ol {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.card li {
  margin: 6px 0;
}

.code-inline,
code,
.copyable {
  font-family: "Consolas", "Cascadia Code", monospace;
}

.copyable,
.code-block,
.file-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  word-break: break-word;
}

.code-block {
  display: block;
  margin-top: 10px;
}

.copy-button {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  transition: 0.25s ease;
}

.copy-button:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.copy-button.is-done {
  border-color: rgba(143, 221, 159, 0.3);
  background: rgba(143, 221, 159, 0.12);
  color: #dff8e5;
}

.step-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.035);
}

.step b {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #112027;
  background: linear-gradient(135deg, var(--gold-soft), var(--cyan));
  font: 700 1rem/1 "Bahnschrift", "Segoe UI Variable Display", sans-serif;
}

.reaction-matrix {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.reaction-item {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.035);
}

.reaction-item strong {
  display: block;
  color: var(--gold-soft);
  margin-bottom: 8px;
}

.link-card {
  display: block;
  transition: 0.25s ease;
}

.link-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(24, 42, 58, 0.76), rgba(9, 18, 27, 0.86));
}

details {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 18px;
  overflow: hidden;
}

details + details {
  margin-top: 12px;
}

summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 600;
  color: var(--gold-soft);
}

summary::-webkit-details-marker {
  display: none;
}

.details-body {
  padding: 0 18px 18px;
  color: var(--muted);
}

.wiki-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
}

.wiki-sidebar {
  position: sticky;
  top: 96px;
  align-self: start;
}

.wiki-sidebar a {
  display: block;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid transparent;
  color: rgba(247, 242, 232, 0.86);
  transition: 0.25s ease;
}

.wiki-sidebar a:hover,
.wiki-sidebar a.is-active {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.site-footer {
  margin-top: 42px;
  text-align: center;
}

@media (max-width: 1180px) {
  .hero-grid,
  .wiki-layout,
  .panel-grid-3,
  .panel-grid-4,
  .wiki-grid,
  .timeline-grid,
  .split-grid,
  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .site-header-inner,
  .main-nav {
    justify-content: center;
  }

  .hero,
  .card {
    padding: 18px;
    border-radius: 24px;
  }

  .hero-grid,
  .panel-grid-2,
  .panel-grid-3,
  .panel-grid-4,
  .wiki-grid,
  .metric-grid,
  .split-grid,
  .timeline-grid,
  .wiki-layout {
    grid-template-columns: 1fr;
  }

  .wiki-sidebar {
    position: static;
  }

  h1 {
    font-size: clamp(2.4rem, 12vw, 3.4rem);
  }

  .button {
    width: 100%;
  }
}