:root {
      --bg: #16120d;
      --surface: #1e1912;
      --surface-2: #252017;
      --fg: #eae1cf;
      --muted: #9d9179;
      --border: color-mix(in oklch, var(--fg) 13%, transparent);
      --border-strong: color-mix(in oklch, var(--fg) 30%, transparent);
      --accent: #d2a24c;
      --accent-soft: color-mix(in oklch, var(--accent) 15%, transparent);
      --on-accent: var(--on-accent);
      --ok: #8bab72;
      --danger: #d1705a;
      --font-display: 'STZhongsong', 'SimSun', 'Songti SC', 'NSimSun', Georgia, serif;
      --font-body: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', system-ui, sans-serif;
      --font-mono: ui-monospace, Consolas, 'Courier New', monospace;
      --fs-h1: clamp(28px, 3.4vw, 40px);
      --fs-h2: clamp(21px, 2.4vw, 26px);
      --gap-xs: 8px; --gap-sm: 12px; --gap-md: 20px; --gap-lg: 32px;
      --gap-xl: 56px; --gap-2xl: 88px;
      --container: 1120px; --gutter: 28px;
      --radius: 10px; --radius-lg: 14px;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
    body {
      margin: 0; background: var(--bg); color: var(--fg);
      font-family: var(--font-body); font-size: 16px; line-height: 1.7;
      text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    p { text-wrap: pretty; }
    h1, h2, h3 { text-wrap: balance; }
    :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

    .container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
    .section { padding-block: clamp(40px, 5.5vw, 64px); }

    .h1, h1 { font-family: var(--font-display); font-size: var(--fs-h1); line-height: 1.32; letter-spacing: 0.02em; margin: 0; }
    .h2, h2 { font-family: var(--font-display); font-size: var(--fs-h2); line-height: 1.32; letter-spacing: 0.02em; margin: 0; }
    .h3, h3 { font-family: var(--font-display); line-height: 1.4; letter-spacing: 0.02em; margin: 0; }
    .eyebrow {
      font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.24em;
      color: var(--accent); margin: 0 0 var(--gap-sm);
    }
    .meta { font-family: var(--font-mono); font-size: 13px; color: var(--muted); letter-spacing: 0.02em; }
    .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

    /* ── topnav ── */
    .topnav {
      position: sticky; top: 0; z-index: 10;
      background: color-mix(in oklch, var(--bg) 88%, transparent);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
    }
    .topnav-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--gap-md); padding-block: 14px; flex-wrap: wrap; }
    .logo { font-family: var(--font-display); font-size: 22px; letter-spacing: 0.14em; }
    .logo em { font-style: normal; color: var(--accent); }
    .topnav nav { display: flex; gap: clamp(14px, 2.4vw, 30px); flex-wrap: wrap; }
    .topnav nav a { font-size: 14px; color: var(--muted); padding: 6px 2px; border-bottom: 2px solid transparent; }
    .topnav nav a:hover { color: var(--fg); }
    .topnav nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }

    /* ── article + sidebar ── */
    .layout { display: grid; grid-template-columns: 1fr 300px; gap: var(--gap-xl); align-items: start; }
    .art-head { padding-block: clamp(40px, 6vw, 64px) 26px; border-bottom: 1px solid var(--border); margin-bottom: 30px; }
    .art-head h1 { margin-bottom: var(--gap-md); }
    .art-meta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }

    .prose { max-width: 68ch; }
    .prose p { margin: 0 0 18px; line-height: 1.85; font-size: 16px; }
    .prose h2 { margin: 44px 0 18px; padding-top: 28px; border-top: 1px solid var(--border); }
    .prose h2:first-of-type { border-top: 0; padding-top: 8px; margin-top: 28px; }
    .prose strong { color: var(--fg); font-weight: 600; }
    .prose .hl { color: var(--accent); font-weight: 600; }
    .prose ul { margin: 0 0 18px; padding-left: 22px; color: var(--fg); line-height: 1.85; }
    .prose li { margin-bottom: 6px; }
    .prose li::marker { color: var(--muted); }

    .step { display: flex; gap: 16px; padding: 16px 0; border-top: 1px solid var(--border); }
    .step:first-of-type { border-top: 0; }
    .step-no {
      font-family: var(--font-mono); font-size: 13px; flex: none;
      width: 34px; height: 34px; display: grid; place-items: center;
      border: 1px solid var(--border-strong); border-radius: 50%;
    }
    .step-body h3 { font-size: 17px; margin-bottom: 6px; }
    .step-body p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.8; }

    .note-card {
      background: var(--surface-2); border: 1px solid var(--border);
      border-radius: var(--radius); padding: 20px 24px; margin: 26px 0;
    }
    .note-card h3 { font-size: 17px; margin-bottom: 8px; }
    .note-card p { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.8; }

    .next-head { font-size: 19px; padding-top: 30px; border-top: 2px solid var(--border-strong); margin: 48px 0 4px; }
    .mini-row { display: flex; justify-content: space-between; align-items: baseline; gap: var(--gap-sm); padding: 13px 0; border-top: 1px solid var(--border); }
    .mini-row a { font-size: 15px; line-height: 1.6; min-width: 0; }
    .mini-row a:hover { color: var(--accent); }
    .mini-row .meta { font-size: 12px; flex: none; }

    /* ── sidebar ── */
    .side-widget { padding-top: 18px; margin-bottom: 44px; border-top: 2px solid var(--border-strong); }
    .side-widget > h3 { font-size: 19px; margin-bottom: 14px; }
    .side-widget .more { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
    .side-widget .more:hover { color: var(--accent); }
    .widget-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 8px; }
    .server-row {
      display: flex; align-items: center; justify-content: space-between; gap: var(--gap-sm);
      padding: 11px 0; border-top: 1px solid var(--border); font-size: 14px;
    }
    .server-row:first-of-type { border-top: 0; }
    .server-name { display: flex; align-items: center; gap: 9px; min-width: 0; }
    .dot { width: 7px; height: 7px; border-radius: 50%; flex: none; }
    .dot-ok { background: var(--ok); }
    .dot-hot { background: var(--danger); }
    .dot-new { background: var(--accent); }
    .dot-plan { background: var(--muted); }
    .side-widget .mini-row a { font-size: 14px; }

    /* ── footer ── */
    .pagefoot { padding-block: var(--gap-xl); color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); line-height: 1.9; }

    @media (max-width: 920px) {
      .layout { grid-template-columns: 1fr; }
      .side-widget { margin-bottom: 36px; }
    }
    @media (max-width: 600px) {
      .topnav-inner { padding-block: 10px; }
    }