:root {
  --bg-ink: #0f1514;
  --bg-deep: #0a0f0e;
  --bg-paper: #f8f2e9;
  --bg-mist: #efe6db;
  --accent-teal: #1f6f6c;
  --accent-amber: #d8a35b;
  --accent-coral: #e06d54;
  --accent-olive: #6c7c4a;
  --text-main: #1b1a17;
  --text-muted: #5a564f;
  --text-light: #fdf9f2;
  --border-soft: rgba(27, 26, 23, 0.12);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow-soft: 0 18px 45px rgba(15, 21, 20, 0.18);
  --shadow-glow: 0 20px 60px rgba(31, 111, 108, 0.2);
  --font-display: 'ZCOOL XiaoWei', 'Noto Serif SC', serif;
  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft Yahei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background: radial-gradient(1200px 700px at 8% 6%, #f6e4c8 0%, transparent 55%),
    radial-gradient(900px 600px at 92% 12%, #cfe3dd 0%, transparent 52%),
    linear-gradient(180deg, #fdf6ec 0%, #f6efe4 45%, #f8f2e9 100%);
}

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(253, 246, 236, 0.86);
  border-bottom: 1px solid var(--border-soft);
  backdrop-filter: blur(16px);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.brand img {
  width: 34px;
  height: 34px;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  overflow-x: auto;
  scrollbar-width: none;
}

.nav::-webkit-scrollbar {
  display: none;
}

.nav a {
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav a:hover {
  color: var(--text-main);
  border-color: var(--accent-teal);
}

.hero {
  padding: 90px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
      90deg,
      rgba(31, 111, 108, 0.08) 0,
      rgba(31, 111, 108, 0.08) 1px,
      transparent 1px,
      transparent 140px
    ),
    repeating-linear-gradient(
      0deg,
      rgba(31, 111, 108, 0.06) 0,
      rgba(31, 111, 108, 0.06) 1px,
      transparent 1px,
      transparent 140px
    );
  opacity: 0.6;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: 0.02em;
  line-height: 1.05;
  color: var(--accent-teal);
}

.hero .subtitle {
  margin-top: 16px;
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--accent-teal);
  color: var(--text-light);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  background: rgba(253, 246, 236, 0.9);
}

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

.hero-panel {
  background: rgba(253, 246, 236, 0.9);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-soft);
}

.panel-title {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.panel-list {
  margin-top: 18px;
  display: grid;
  gap: 16px;
}

.panel-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: center;
}

.panel-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--bg-mist);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-teal);
}

.panel-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.panel-item p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.section {
  padding: 72px 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 18px;
  color: var(--bg-ink);
}

.section-desc {
  color: var(--text-muted);
  max-width: 720px;
}

.points {
  margin-top: 36px;
  display: grid;
  gap: 18px;
}

.point {
  background: rgba(253, 246, 236, 0.95);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: 0 12px 28px rgba(15, 21, 20, 0.08);
}

.point h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.point p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.cards {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: linear-gradient(160deg, rgba(31, 111, 108, 0.08), rgba(216, 163, 91, 0.08));
  border: 1px solid rgba(31, 111, 108, 0.18);
  border-radius: var(--radius-md);
  padding: 22px;
}

.card h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.arch-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.arch-block {
  background: var(--bg-ink);
  color: var(--text-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-soft);
}

.arch-block h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.arch-block p {
  color: rgba(253, 249, 242, 0.78);
  font-size: 0.92rem;
}

.download {
  background: linear-gradient(120deg, #0f1514 0%, #1f2a28 100%);
  color: var(--text-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: grid;
  gap: 18px;
}

.download h3 {
  font-family: var(--font-display);
  font-size: 2rem;
}

.download p {
  color: rgba(253, 249, 242, 0.75);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.download .btn-outline {
  border-color: rgba(253, 249, 242, 0.4);
  color: var(--text-light);
  background: transparent;
}

.footer {
  padding: 40px 0 60px;
  color: var(--text-muted);
  text-align: center;
  font-size: 0.9rem;
}

.footer span {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .hero {
    padding: 70px 0 60px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .panel-item {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

.wiki-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.wiki-card {
  background: rgba(253, 246, 236, 0.95);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: 0 16px 30px rgba(15, 21, 20, 0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.wiki-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 36px rgba(15, 21, 20, 0.16);
}

.wiki-card h4 {
  font-size: 1.05rem;
  margin: 10px 0 8px;
}

.wiki-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.wiki-tag {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--bg-mist);
  color: var(--accent-teal);
}

.wiki-meta {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.78rem;
  color: rgba(27, 26, 23, 0.55);
}

.wiki-actions {
  margin-top: 24px;
  display: flex;
  justify-content: flex-start;
}

.wiki-detail {
  margin-top: 32px;
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(253, 246, 236, 0.96);
  border: 1px solid var(--border-soft);
  box-shadow: 0 12px 24px rgba(15, 21, 20, 0.08);
}

.wiki-detail h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.wiki-detail p {
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.7;
}