:root {
  color-scheme: light;
  --paper: #f7f5f0;
  --surface: #ffffff;
  --surface-soft: #fbfaf7;
  --ink: #172033;
  --ink-soft: #3d475c;
  --muted: #687386;
  --line: #e3ded3;
  --accent: #1f4fd8;
  --accent-dark: #173ea7;
  --accent-soft: #edf2ff;
  --teal: #0f766e;
  --teal-soft: #eaf5f3;
  --amber-soft: #fff5df;
  --shadow: 0 18px 45px rgba(23, 32, 51, 0.08);
  --radius: 16px;
  --content: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.container {
  width: min(100% - 40px, var(--content));
  margin: 0 auto;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -100px;
  z-index: 100;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(226, 221, 210, 0.92);
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-name {
  font-size: 18px;
  font-weight: 750;
}

.brand-tagline {
  color: var(--muted);
  font-size: 12px;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: block;
  padding: 9px 13px;
  border-radius: 9px;
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 550;
}

.site-nav a:hover {
  background: rgba(31, 79, 216, 0.08);
  color: var(--accent);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(115deg, rgba(31, 79, 216, 0.07), rgba(15, 118, 110, 0.05)),
    var(--paper);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(31, 79, 216, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 79, 216, 0.055) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 70% 20%, #000 0%, transparent 72%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: 56px;
  align-items: center;
  padding: 78px 0 86px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  color: var(--ink);
  font-weight: 760;
  line-height: 1.22;
  letter-spacing: -0.025em;
}

.hero h1 {
  max-width: 700px;
  margin: 0;
  font-size: clamp(37px, 5vw, 61px);
}

.hero-copy {
  max-width: 610px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 11px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 680;
  box-shadow: 0 12px 26px rgba(31, 79, 216, 0.2);
}

.button:hover {
  background: var(--accent-dark);
  text-decoration: none;
}

.button-secondary {
  border-color: rgba(23, 32, 51, 0.14);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  box-shadow: none;
}

.button-secondary:hover {
  border-color: rgba(31, 79, 216, 0.32);
  background: #fff;
  color: var(--accent-dark);
}

.architecture-card {
  position: relative;
  padding: 24px;
  border: 1px solid rgba(226, 221, 210, 0.9);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.architecture-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.architecture-label {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.region-map {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.region {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

.region strong {
  display: block;
  margin-bottom: 5px;
  font-size: 14px;
}

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

.network-paths {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 18px 0;
  color: var(--muted);
  font-size: 12px;
}

.network-paths::before,
.network-paths::after {
  content: "";
  flex: 1;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--accent) 0 6px, transparent 6px 12px);
  opacity: 0.45;
}

.terminal {
  margin: 0;
  padding: 17px;
  border-radius: 13px;
  background: #172033;
  color: #dbe5ff;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12.5px;
  line-height: 1.75;
  white-space: pre-wrap;
}

.terminal strong {
  color: #8fd8ce;
}

.topic-strip {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.topic-strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.topic-title {
  flex: 0 0 auto;
  margin: 0;
  color: var(--ink);
  font-size: 14px;
}

.topic-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.topic-list span,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 550;
}

.tag-accent {
  border-color: rgba(31, 79, 216, 0.18);
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.tag-teal {
  border-color: rgba(15, 118, 110, 0.18);
  background: var(--teal-soft);
  color: var(--teal);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 44px;
  padding: 62px 0 76px;
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.section-header h2 {
  margin: 0;
  font-size: 28px;
}

.section-header p {
  margin: 7px 0 0;
  color: var(--muted);
}

.more-link {
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 14px;
  font-weight: 650;
}

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

.article-card {
  display: flex;
  flex-direction: column;
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(23, 32, 51, 0.04);
}

.article-card:hover {
  border-color: rgba(31, 79, 216, 0.28);
  box-shadow: 0 18px 42px rgba(23, 32, 51, 0.09);
}

.article-card h3 {
  margin: 15px 0 10px;
  font-size: 19px;
}

.article-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14.5px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: auto;
  padding-top: 19px;
  color: var(--muted);
  font-size: 12.5px;
}

.article-meta time {
  margin-left: auto;
}

.article-row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.article-row:last-child {
  border-bottom: 0;
}

.article-row time {
  color: var(--muted);
  font-size: 13px;
}

.article-row h3 {
  margin: 0 0 7px;
  font-size: 18px;
}

.article-row p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.panel h2,
.panel h3 {
  margin: 0 0 15px;
  font-size: 17px;
}

.category-list,
.archive-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.category-list li + li,
.archive-list li + li {
  margin-top: 10px;
}

.category-list a,
.archive-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.category-list a:hover,
.archive-list a:hover {
  background: var(--accent-soft);
  color: var(--accent-dark);
  text-decoration: none;
}

.count {
  color: var(--muted);
  font-size: 12px;
}

.panel-note {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.principles {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.principles li {
  display: flex;
  gap: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.principles strong {
  color: var(--ink);
}

.page-hero {
  padding: 66px 0 44px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(31, 79, 216, 0.06), transparent);
}

.page-hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(33px, 4vw, 48px);
}

.page-hero p {
  max-width: 720px;
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) 300px;
  justify-content: space-between;
  gap: 54px;
  padding: 56px 0 78px;
}

.article-body {
  color: var(--ink-soft);
  font-size: 16.5px;
}

.article-body h2 {
  margin: 44px 0 14px;
  font-size: 25px;
}

.article-body h3 {
  margin: 32px 0 11px;
  font-size: 19px;
}

.article-body p {
  margin: 0 0 17px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px;
  padding-left: 23px;
}

.article-body li + li {
  margin-top: 8px;
}

.article-body strong {
  color: var(--ink);
}

.callout {
  margin: 26px 0;
  padding: 19px 21px;
  border-left: 3px solid var(--accent);
  border-radius: 4px 13px 13px 4px;
  background: var(--accent-soft);
  color: var(--ink-soft);
}

.callout strong {
  color: var(--accent-dark);
}

.data-table {
  width: 100%;
  margin: 24px 0 30px;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 0 0 1px var(--line);
  font-size: 14px;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: #f1eee7;
  color: var(--ink);
  font-size: 13px;
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.code-block {
  margin: 23px 0;
  padding: 18px;
  border-radius: 12px;
  background: #172033;
  color: #e4ebff;
  overflow-x: auto;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.7;
}

.article-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  margin-top: 45px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.article-footer a {
  font-weight: 650;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #efede7;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 31px 0;
  color: var(--muted);
  font-size: 13.5px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--accent-dark);
}

.icp-link {
  color: var(--muted);
}

.icp-link:hover {
  color: var(--accent-dark);
}

.empty-state {
  padding: 70px 24px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: center;
}

@media (max-width: 1020px) {
  .hero-inner,
  .layout,
  .page-layout {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding: 58px 0 66px;
  }

  .page-layout {
    gap: 36px;
  }

  .sidebar {
    order: 2;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 28px, var(--content));
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 16px 0;
  }

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

  .site-nav ul {
    gap: 3px;
  }

  .site-nav a {
    padding: 8px 10px;
    white-space: nowrap;
  }

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

  .topic-strip-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .topic-list {
    justify-content: flex-start;
  }

  .article-row {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .section-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .architecture-card {
    padding: 17px;
  }

  .region-map {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}