:root {
  --bg: #11100f;
  --bg-soft: #1a1715;
  --paper: #f5f0e7;
  --paper-strong: #fffaf3;
  --paper-deep: #e8decd;
  --ink: #171412;
  --ink-soft: #403730;
  --ink-muted: #6d6259;
  --line: rgba(96, 80, 66, 0.18);
  --line-strong: rgba(96, 80, 66, 0.3);
  --panel: rgba(255, 248, 238, 0.78);
  --panel-dark: rgba(24, 20, 18, 0.84);
  --accent: #b86a38;
  --accent-strong: #8c4d22;
  --accent-soft: rgba(184, 106, 56, 0.16);
  --accent-glow: rgba(184, 106, 56, 0.24);
  --ok: #2f7a63;
  --warn: #756453;
  --max: 1140px;
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --shadow-lg: 0 30px 90px rgba(10, 9, 8, 0.22);
  --shadow-md: 0 16px 40px rgba(17, 14, 12, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(900px 520px at 78% 0%, rgba(184, 106, 56, 0.14), transparent 58%),
    radial-gradient(1200px 820px at -6% 10%, rgba(255, 255, 255, 0.3), transparent 42%),
    linear-gradient(180deg, #efe6d8 0%, #f5f0e7 34%, #f8f4ed 100%);
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  line-height: 1.6;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  opacity: 0.08;
  background-image: linear-gradient(rgba(23, 20, 18, 0.14) 1px, transparent 1px);
  background-size: 100% 28px;
}

body::after {
  opacity: 0.22;
  background:
    radial-gradient(circle at 12% 24%, rgba(184, 106, 56, 0.18), transparent 18%),
    radial-gradient(circle at 84% 18%, rgba(23, 20, 18, 0.1), transparent 20%);
}

a {
  color: inherit;
}

.shell {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 24px 42px;
}

.header {
  position: sticky;
  top: 16px;
  z-index: 20;
  margin: 0 auto 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
  background: rgba(245, 240, 231, 0.72);
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(52, 42, 34, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.brand:hover {
  opacity: 0.92;
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: fit-content;
}

.brand-sub {
  color: var(--ink-muted);
  font-family: "Space Grotesk", sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.subnav {
  margin: 0 auto 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.subnav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(17, 16, 15, 0.08);
  background: rgba(255, 250, 243, 0.68);
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 12px;
  font-weight: 700;
  transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.subnav a:hover,
.subnav a.active {
  color: var(--ink);
  border-color: rgba(17, 16, 15, 0.14);
  background: rgba(255, 250, 243, 0.94);
  transform: translateY(-1px);
}

.logo-dot {
  width: 13px;
  height: 13px;
  border-radius: 999px;
  background: radial-gradient(circle at 34% 34%, #ffd6b4 0, #c47c46 40%, #5c2d14 100%);
  box-shadow: 0 0 0 4px rgba(184, 106, 56, 0.14);
}

.nav {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  flex-wrap: wrap;
}

.nav a {
  padding: 8px 11px;
  border-radius: 999px;
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--ink);
  background: rgba(17, 16, 15, 0.07);
  transform: translateY(-1px);
}

.hero,
.section {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.42);
  box-shadow: var(--shadow-lg);
}

.hero {
  padding: clamp(28px, 4vw, 48px);
  background:
    radial-gradient(420px 320px at 90% 8%, rgba(184, 106, 56, 0.22), transparent 58%),
    radial-gradient(360px 280px at 14% 88%, rgba(255, 246, 234, 0.08), transparent 60%),
    linear-gradient(145deg, #151211 0%, #1d1916 42%, #100e0d 100%);
  color: var(--paper);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -12% auto;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 106, 56, 0.22), transparent 64%);
}

.section {
  margin-top: 20px;
  padding: clamp(22px, 3vw, 30px);
  background: linear-gradient(180deg, rgba(255, 251, 245, 0.9), rgba(242, 234, 221, 0.88));
}

.section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.26), transparent 40%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: stretch;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow,
.section-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.eyebrow {
  color: #d5b79d;
}

.section-label {
  color: var(--accent);
}

.hero h1,
.section h2 {
  margin: 10px 0 0;
  font-family: "Noto Serif SC", "Songti SC", serif;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(38px, 6.3vw, 72px);
  max-width: 720px;
}

.section h2 {
  font-size: clamp(28px, 3.4vw, 44px);
  color: var(--ink);
}

.hero p,
.section .desc {
  margin: 12px 0 0;
}

.hero p {
  max-width: 700px;
  color: rgba(245, 240, 231, 0.84);
  font-size: clamp(16px, 2vw, 22px);
}

.section .desc {
  max-width: 780px;
  color: var(--ink-muted);
}

.hero-meta {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: rgba(245, 240, 231, 0.68);
  font-size: 13px;
}

.cta-row {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 12px 18px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #fff8f2;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 16px 34px rgba(140, 77, 34, 0.3);
}

.button.secondary {
  color: var(--ink);
  background: rgba(17, 16, 15, 0.04);
  border: 1px solid var(--line-strong);
}

.button.soft {
  color: var(--ink);
  background: rgba(17, 16, 15, 0.06);
  border: 1px solid rgba(17, 16, 15, 0.08);
}

.hero .button.secondary {
  color: var(--paper);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.button[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.58;
}

.hero-points {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  max-width: 620px;
  color: rgba(245, 240, 231, 0.76);
  font-size: 14px;
}

.hero-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.hero-points li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  margin-top: 8px;
  flex: none;
  background: linear-gradient(135deg, #f2b788, var(--accent));
}

.trace-panel {
  position: relative;
  z-index: 1;
  padding: 18px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background:
    linear-gradient(180deg, rgba(255, 251, 245, 0.1), rgba(255, 251, 245, 0.04)),
    rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(8px);
  display: grid;
  gap: 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.trace-panel-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.trace-chip,
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.trace-chip {
  color: #f8ebdf;
  background: rgba(255, 255, 255, 0.08);
}

.trace-chip.muted {
  color: rgba(245, 240, 231, 0.62);
}

.trace-stream {
  display: grid;
  gap: 10px;
}

.trace-node {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  align-items: flex-start;
}

.trace-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(184, 106, 56, 0.16);
  color: #ffd8bc;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.trace-node strong {
  display: block;
  margin-top: 2px;
  color: #fff7f0;
  font-size: 15px;
}

.trace-node p {
  margin: 4px 0 0;
  color: rgba(245, 240, 231, 0.68);
  font-size: 13px;
}

.trace-line {
  width: 1px;
  height: 18px;
  margin-left: 21px;
  background: linear-gradient(180deg, rgba(242, 183, 136, 0.6), transparent);
}

.mini-note {
  border-radius: 20px;
  background: rgba(13, 11, 10, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.mini-note-bar {
  display: flex;
  gap: 8px;
  padding: 12px 14px 0;
}

.mini-note-bar span {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
}

.mini-note pre {
  margin: 0;
  padding: 14px;
  color: #f4eadf;
  font: 13px/1.7 "SFMono-Regular", "Menlo", monospace;
  white-space: pre-wrap;
}

.grid {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(220px, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(210px, 1fr));
}

.card,
.flow-card {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 250, 243, 0.86);
  box-shadow: var(--shadow-md);
}

.card {
  padding: 18px;
}

.card h3,
.flow-card h3,
.timeline-item h3 {
  margin: 0;
  font-size: 20px;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
}

.card p,
.flow-card p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.story-card {
  min-height: 176px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(250, 244, 235, 0.86));
}

.trace-flow {
  position: relative;
  z-index: 1;
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.flow-card {
  padding: 18px;
}

.flow-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.kpis {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 10px;
}

.kpi {
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 249, 239, 0.78);
  padding: 12px 14px;
}

.kpi strong {
  display: block;
  font-size: 18px;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
}

.kpi span {
  color: var(--ink-muted);
  font-size: 12px;
}

.release-stack {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.platform-card {
  display: grid;
  gap: 12px;
}

.platform-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.pill {
  color: #fff8f2;
  background: var(--warn);
}

.pill.available {
  background: var(--ok);
}

.meta-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
  color: var(--ink-soft);
  font-size: 13px;
}

.meta-list code {
  font-size: 12px;
  color: var(--accent-strong);
  word-break: break-all;
}

.release-notes {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 250, 243, 0.76);
}

.release-notes li {
  position: relative;
  padding-left: 16px;
}

.release-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent);
}

.table-wrap {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  overflow-x: auto;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 250, 243, 0.7);
}

.table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.table th {
  color: var(--ink);
  font-weight: 700;
  background: rgba(17, 16, 15, 0.04);
}

.table td {
  color: var(--ink-soft);
}

.timeline {
  position: relative;
  z-index: 1;
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

.timeline-item {
  padding: 16px 18px 16px 22px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 250, 243, 0.82);
  box-shadow: var(--shadow-md);
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  inset: 16px auto 16px 0;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), rgba(184, 106, 56, 0.22));
}

.timeline-item ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--ink-soft);
}

.faq-list {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.faq-item {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 250, 243, 0.76);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 16px;
  font-weight: 700;
  color: var(--ink);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin: 0;
  padding: 0 16px 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.meta-row,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.meta-row {
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(17, 16, 15, 0.06);
  border: 1px solid rgba(17, 16, 15, 0.08);
  color: var(--ink);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.feature-story {
  padding: 22px;
}

.feature-story-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: 22px;
  align-items: start;
}

.feature-story-title {
  margin-top: 14px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
  font-family: "Noto Serif SC", "Songti SC", serif;
}

.feature-story-title a {
  text-decoration: none;
}

.feature-story-excerpt {
  margin-top: 12px;
  font-size: 17px;
  line-height: 1.8;
}

.feature-notes {
  padding: 18px;
  border-radius: 20px;
  background: rgba(17, 16, 15, 0.04);
  border: 1px solid rgba(17, 16, 15, 0.06);
}

.feature-notes h4,
.article-summary h3,
.article-endcap h3 {
  margin: 0;
  font-size: 18px;
  font-family: "Space Grotesk", sans-serif;
}

.feature-points {
  margin-top: 12px;
}

.archive-list {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.archive-item {
  display: block;
  padding: 18px;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.archive-item:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.archive-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 700;
}

.article-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 24px;
  align-items: start;
}

.article-body {
  min-width: 0;
  color: var(--ink-soft);
}

.article-body .lead {
  margin-top: 0;
  font-size: 21px;
  line-height: 1.9;
  color: var(--ink);
}

.article-body p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.95;
}

.article-body h2,
.article-body h3 {
  margin: 36px 0 14px;
  color: var(--ink);
}

.article-body h2 {
  font-size: clamp(28px, 3.2vw, 38px);
  line-height: 1.18;
  font-family: "Noto Serif SC", "Songti SC", serif;
}

.article-body h3 {
  font-size: 21px;
  font-family: "Space Grotesk", sans-serif;
}

.article-body blockquote {
  margin: 22px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--accent);
  border-radius: 0 18px 18px 0;
  background: rgba(17, 16, 15, 0.04);
}

.article-body blockquote p {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
}

.article-summary {
  margin-bottom: 28px;
  padding: 20px;
}

.article-endcap {
  margin-top: 30px;
  padding: 20px;
}

.toc-card {
  position: sticky;
  top: 100px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 250, 243, 0.78);
  box-shadow: var(--shadow-md);
}

.toc-label {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: "Space Grotesk", sans-serif;
}

.toc-nav {
  display: grid;
  gap: 8px;
}

.toc-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.55;
}

.toc-nav a:hover {
  color: var(--ink);
}

.footer {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  color: var(--ink-muted);
  font-size: 12px;
}

.footer nav {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer a {
  color: var(--ink-soft);
  text-decoration: none;
}

.footer a:hover {
  color: var(--ink);
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  animation: reveal 0.45s ease forwards;
}

.reveal.delay-1 { animation-delay: 0.06s; }
.reveal.delay-2 { animation-delay: 0.12s; }
.reveal.delay-3 { animation-delay: 0.18s; }

@keyframes reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .trace-flow,
  .grid.three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-story-grid,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    align-items: start;
  }

  .trace-panel {
    grid-column: 1 / -1;
  }

  .toc-card {
    position: static;
  }

  .kpis {
    grid-template-columns: repeat(2, minmax(140px, 1fr));
  }
}

@media (max-width: 760px) {
  .shell {
    padding: 14px 14px 30px;
  }

  .header {
    top: 10px;
    border-radius: 24px;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
  }

  .brand-sub {
    font-size: 9px;
  }

  .subnav {
    margin-bottom: 14px;
  }

  .hero-grid,
  .grid.two,
  .grid.three,
  .trace-flow {
    grid-template-columns: 1fr;
  }

  .hero-meta,
  .cta-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .kpis {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .kpis {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}