* { margin: 0; padding: 0; box-sizing: border-box; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Sora', sans-serif;
    font-size: 15px;
    line-height: 1.7;
    min-height: 100vh;
  }

  .hero {
    position: relative;
    padding: 80px 40px 60px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: -100px; left: 50%;
    transform: translateX(-50%);
    width: 600px; height: 400px;
    pointer-events: none;
  }

  .hero-badge {
    display: inline-block;
    background: rgba(232,160,32,0.1);
    border: 1px solid rgba(232,160,32,0.3);
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    padding: 6px 16px;
    border-radius: 2px;
    margin-bottom: 24px;
  }

  .hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
    background: var(--accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero p {
    color: var(--muted);
    font-size: 16px;
    max-width: 560px;
    margin: 0 auto 32px;
    font-weight: 300;
  }

  .hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
  }

  .stat {
    text-align: center;
  }

  .stat-num {
    font-size: 28px;
    font-weight: 800;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
  }

  .stat-label {
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 1px;
    text-transform: uppercase;
  }

  .layout {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
  }

  /* Sidebar TOC */
  .toc {
    width: 260px;
    flex-shrink: 0;
    padding: 40px 20px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    border-right: 1px solid var(--border);
  }

  .toc-title {
    font-size: 10px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
    font-family: 'JetBrains Mono', monospace;
  }

  .toc a {
    display: block;
    color: var(--muted);
    text-decoration: none;
    font-size: 13px;
    padding: 5px 12px;
    border-left: 2px solid transparent;
    transition: all 0.2s;
    margin-bottom: 2px;
  }

  .toc a:hover {
    color: var(--accent);
    border-left-color: var(--accent);
    background: rgba(232,160,32,0.05);
  }

  .toc a.sub {
    padding-left: 24px;
    font-size: 12px;
  }

  /* Main content */
  .content {
    flex: 1;
    padding: 40px 60px;
    max-width: 860px;
  }

  /* Hardware section */
  .hardware-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin: 24px 0;
  }

  .hw-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .hw-icon {
    font-size: 24px;
    flex-shrink: 0;
  }

  .hw-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
  }

  .hw-desc {
    font-size: 11px;
    color: var(--muted);
    margin-top: 2px;
  }

  /* Step sections */
  .step-section {
    margin-bottom: 60px;
    animation: fadeUp 0.5s ease both;
  }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .step-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
  }

  .step-num {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--accent), #f59e0b);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800;
    font-size: 16px;
    color: #000;
    flex-shrink: 0;
    font-family: 'JetBrains Mono', monospace;
  }

  .step-title {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
  }

  .step-subtitle {
    font-size: 13px;
    color: var(--muted);
    margin-top: 2px;
  }

  /* Command blocks */
  .cmd-block {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 16px 0;
    overflow: hidden;
  }

  .cmd-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid var(--border);
  }

  .cmd-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 1px;
  }

  .cmd-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent3);
    box-shadow: 0 0 8px var(--accent3);
  }

  .cmd-body {
    padding: 16px 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: #a5f3fc;
    white-space: pre-wrap;
    word-break: break-all;
  }

  .cmd-body .comment {
    color: var(--muted);
    font-style: italic;
  }

  /* Info boxes */
  .info-box {
    border-radius: 8px;
    padding: 16px 20px;
    margin: 16px 0;
    display: flex;
    gap: 14px;
    align-items: flex-start;
  }

  .info-box.tip {
    background: rgba(16,185,129,0.08);
    border: 1px solid rgba(16,185,129,0.2);
  }

  .info-box.warning {
    background: rgba(245,158,11,0.08);
    border: 1px solid rgba(245,158,11,0.2);
  }

  .info-box.danger {
    background: rgba(239,68,68,0.08);
    border: 1px solid rgba(239,68,68,0.2);
  }

  .info-box-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }

  .info-box-content { font-size: 13px; line-height: 1.6; }

  .info-box.tip .info-box-content { color: #6ee7b7; }
  .info-box.warning .info-box-content { color: #fcd34d; }
  .info-box.danger .info-box-content { color: #fca5a5; }

  /* Explanation text */
  .explain {
    color: #94a3b8;
    font-size: 14px;
    margin: 12px 0;
    line-height: 1.7;
  }

  .explain strong { color: var(--text); }

  /* File structure */
  .file-tree {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: #c9d1d9;
    line-height: 2;
  }

  .file-tree .dir { color: var(--accent2); }
  .file-tree .file { color: #a5f3fc; }
  .file-tree .note { color: var(--muted); }

  /* Table */
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 13px;
  }

  th {
    background: var(--surface2);
    color: var(--muted);
    text-align: left;
    padding: 10px 14px;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
  }

  td {
    padding: 10px 14px;
    border: 1px solid var(--border);
    color: var(--text);
    vertical-align: top;
  }

  tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

  td code {
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: #a5f3fc;
  }

  /* Checklist */
  .checklist { list-style: none; margin: 16px 0; }

  .checklist li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 6px 0;
    font-size: 14px;
    color: #94a3b8;
    border-bottom: 1px solid rgba(255,255,255,0.04);
  }

  .checklist li:last-child { border-bottom: none; }

  .check { color: var(--accent3); font-size: 16px; flex-shrink: 0; }

  h3 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin: 24px 0 10px;
  }

  h3::before {
    content: '// ';
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
  }

  /* Section divider */
  .divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 40px 0;
  }

  /* Final summary */
  .summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin: 24px 0;
  }

  .summary-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
  }

  .summary-card .icon { font-size: 32px; margin-bottom: 8px; }
  .summary-card .label { font-size: 13px; color: var(--muted); }
  .summary-card .value { font-size: 15px; font-weight: 600; color: var(--text); margin-top: 4px; }

  /* Inline code */
  p code, li code {
    background: var(--code-bg);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 3px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: #a5f3fc;
  }

  /* Footer */
  footer {
    border-top: 1px solid var(--border);
    padding: 30px 60px;
    text-align: center;
    color: var(--muted);
    font-size: 12px;
    font-family: 'JetBrains Mono', monospace;
  }

  @media (max-width: 768px) {
    .toc { display: none; }
    .content { padding: 24px 20px; }
    .hero { padding: 40px 20px; }
  }