/* ============ GGUF-style minimal tokens ============ */
  :root {
    --bg: #ffffff;
    --ink: #111111;
    --ink-2: #555555;
    --ink-3: #8a8a8a;
    --line: #e6e6e6;
    --line-strong: #111111;
    --paper: #fafafa;
    --accent: #111111;
  }
  * { box-sizing: border-box; }
  html, body { margin: 0; padding: 0; }
  body {
    background: var(--bg);
    color: var(--ink);
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }
  .serif {
    font-family: "Source Serif 4", Georgia, "Songti SC", "SimSun", serif;
  }
  a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-strong); }
  a:hover { color: #000; }
  code, .mono {
    font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
    font-size: .88em;
    background: var(--paper);
    padding: 2px 6px;
    border-radius: 3px;
  }

  /* ============ Top bar ============ */
  .topbar {
    border-bottom: 1px solid var(--line);
  }
  .topbar-inner {
    max-width: 720px; margin: 0 auto;
    padding: 22px 24px;
    display: flex; align-items: center; justify-content: space-between;
  }
  .brand { font-weight: 600; font-size: 15px; letter-spacing: -.01em; }
  .brand a { text-decoration: none; color: var(--ink); }
  .brand .dot { color: var(--ink-3); margin: 0 8px; font-weight: 400; }
  .brand .site { color: var(--ink-3); font-weight: 400; font-size: 13px; }
  .lang-switch { display: flex; gap: 18px; font-size: 13px; }
  .lang-switch button {
    border: 0; background: transparent; cursor: pointer; padding: 0;
    font: inherit; color: var(--ink-3);
  }
  .lang-switch button.active { color: var(--ink); font-weight: 600; }
  .lang-switch button:hover { color: var(--ink); }

  /* ============ Layout ============ */
  .container { max-width: 720px; margin: 0 auto; padding: 0 24px; }

  /* Hero */
  .hero { padding: 48px 0 48px; }
  .eyebrow {
    font-size: 12px; letter-spacing: .18em; text-transform: uppercase;
    color: var(--ink-3); margin-bottom: 24px;
  }
  h1.title {
    font-family: "Source Serif 4", Georgia, serif;
    font-size: 44px; line-height: 1.2; font-weight: 600;
    margin: 0 0 24px; letter-spacing: -.015em;
  }
  .lead {
    font-size: 17px; color: var(--ink-2); margin: 0; max-width: 620px;
  }

  /* Reference screenshots (the two real ones user gave) */
  .refs { margin: 48px 0 0; display: flex; flex-direction: column; gap: 28px; }
  .ref figure { margin: 0; }
  .ref img {
    display: block; width: 100%; height: auto;
    border: 1px solid var(--line); border-radius: 4px;
  }
  .ref figcaption {
    font-size: 13px; color: var(--ink-3); margin-top: 10px;
  }
  .ref figcaption b { color: var(--ink-2); font-weight: 600; }

  /* ============ Section ============ */
  section.chapter { padding: 72px 0 0; }
  .chapter-num {
    font-family: "Source Serif 4", serif;
    font-size: 14px; color: var(--ink-3); margin-bottom: 12px;
  }
  h2.chapter-title {
    font-family: "Source Serif 4", serif;
    font-size: 30px; font-weight: 600; margin: 0 0 12px; letter-spacing: -.01em;
  }
  .chapter-lede { color: var(--ink-2); font-size: 16px; margin: 0 0 40px; }

  /* Provider tabs — minimal text tabs */
  .tabs {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin-bottom: 40px;
  }
  .tab {
    border: 1px solid var(--border, var(--line)); background: #fff;
    cursor: pointer; font: inherit; font-size: 14px;
    color: var(--ink-2);
    padding: 8px 16px; border-radius: 999px;
    display: inline-flex; align-items: center; gap: 6px;
    transition: all .15s ease;
  }
  .tab:hover { border-color: var(--ink); color: var(--ink); }
  .tab.active {
    background: var(--ink); color: #fff; border-color: var(--ink); font-weight: 600;
  }
  .tab .free {
    font-size: 11px; color: var(--ink-3); font-weight: 400;
  }
  .tab.active .free { color: rgba(255,255,255,.7); }

  /* Provider block */
  .provider-intro { margin-bottom: 40px; }
  .provider-intro h3 {
    font-family: "Source Serif 4", serif;
    font-size: 22px; margin: 0 0 8px; font-weight: 600;
  }
  .provider-intro p { margin: 0; color: var(--ink-2); font-size: 15px; }

  /* Steps */
  ol.steps { list-style: none; counter-reset: step; margin: 0; padding: 0; }
  .step {
    counter-increment: step;
    padding: 32px 0;
    border-top: 1px solid var(--line);
    display: grid; grid-template-columns: 36px 1fr; gap: 18px;
  }
  .step:last-of-type { border-bottom: 1px solid var(--line); }
  .step::before {
    content: counter(step, decimal-leading-zero);
    font-family: "Source Serif 4", serif;
    font-size: 15px; color: var(--ink-3); padding-top: 5px;
  }
  .step-body h4 { margin: 0 0 8px; font-size: 17px; font-weight: 600; letter-spacing: -.005em; }
  .step-body p { margin: 0 0 14px; color: var(--ink-2); font-size: 15px; }
  .step-body p:last-child { margin-bottom: 0; }

  /* ============ Inline minimal diagram ============ */
  .diagram {
    margin: 16px 0 4px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--paper);
    padding: 18px;
    font-size: 13px;
  }
  .diagram .mockbar {
    display: flex; align-items: center; gap: 6px;
    padding-bottom: 12px; margin-bottom: 14px;
    border-bottom: 1px dashed var(--line);
  }
  .diagram .mockbar i {
    width: 8px; height: 8px; border-radius: 50%;
    background: #dcdcdc; display: inline-block;
  }
  .diagram .mockbar .url {
    margin-left: 10px; color: var(--ink-3); font-size: 12px;
    font-family: "SF Mono", Menlo, monospace;
  }
  /* Inside the mock: a row of abstract UI blocks */
  .mockrow { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
  .mockchip {
    border: 1px solid var(--line); background: #fff;
    padding: 6px 12px; border-radius: 4px; color: var(--ink-2);
    font-size: 12.5px;
  }
  .mockchip.hl {
    background: var(--ink); color: #fff; border-color: var(--ink);
    position: relative;
  }
  .mockchip.hl::after {
    content: ""; position: absolute; left: -8px; top: 50%;
    width: 6px; height: 1px; background: var(--ink);
  }
  .mockchip.hl::before {
    content: ""; position: absolute; left: -12px; top: calc(50% - 3px);
    width: 0; height: 0;
    border-top: 3px solid transparent; border-bottom: 3px solid transparent;
    border-right: 6px solid var(--ink);
  }
  .mockfield {
    flex: 1 1 200px; border: 1px solid var(--line); background: #fff;
    padding: 8px 12px; border-radius: 4px; color: var(--ink-3);
    font-size: 12.5px; font-family: "SF Mono", Menlo, monospace;
  }
  .mockfield.hl { border-color: var(--ink); color: var(--ink); }
  .diagram .cap {
    margin-top: 12px; padding-top: 10px;
    border-top: 1px dashed var(--line);
    color: var(--ink-3); font-size: 12px;
  }
  .diagram .cap b { color: var(--ink-2); font-weight: 600; }

  /* ============ Real screenshots ============ */
  figure.shot {
    margin: 18px 0 4px;
  }
  figure.shot img {
    display: block; width: 100%; height: auto;
    border: 1px solid var(--line); border-radius: 4px;
  }
  figure.shot figcaption {
    font-size: 12.5px; color: var(--ink-3); margin-top: 8px;
  }

  /* Callout (minimal) */
  .note {
    margin-top: 16px; padding: 14px 16px;
    border-left: 2px solid var(--ink);
    background: var(--paper);
    font-size: 14px; color: var(--ink-2);
  }
  .note b { color: var(--ink); }

  /* Mapping table — minimal lines */
  .map-title {
    margin: 40px 0 0; font-size: 12px; letter-spacing: .14em;
    text-transform: uppercase; color: var(--ink-3);
  }
  table.map {
    width: 100%; border-collapse: collapse; margin-top: 14px;
    font-size: 14px;
  }
  table.map th, table.map td {
    text-align: left; padding: 12px 0;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
  }
  table.map th {
    font-weight: 500; color: var(--ink-3); font-size: 12px;
    text-transform: uppercase; letter-spacing: .08em;
    border-bottom: 1px solid var(--ink);
  }
  table.map td.field { width: 38%; font-weight: 600; }
  table.map td .mono { background: transparent; padding: 0; }

  /* FAQ */
  details {
    border-top: 1px solid var(--line);
    padding: 20px 0;
  }
  details:last-of-type { border-bottom: 1px solid var(--line); }
  details summary {
    cursor: pointer; font-weight: 600; font-size: 16px;
    list-style: none; display: flex; justify-content: space-between; align-items: baseline;
  }
  details summary::-webkit-details-marker { display: none; }
  details summary::after { content: "+"; color: var(--ink-3); font-weight: 400; }
  details[open] summary::after { content: "–"; }
  details p { margin: 12px 0 0; color: var(--ink-2); font-size: 15px; }

  footer {
    margin-top: 80px; padding: 32px 0 60px;
    border-top: 1px solid var(--line);
    color: var(--ink-3); font-size: 13px;
    text-align: center;
  }
  footer b { color: var(--ink-2); font-weight: 600; }
  footer a { color: var(--ink-3); text-decoration: none; }

  /* ============ Sticky section nav ============ */
  .sectionnav {
    position: sticky; top: 0; z-index: 40;
    background: #ffffff;
    border-bottom: 1px solid var(--ink);
    box-shadow: 0 4px 16px rgba(17,24,39,.08);
  }
  .sectionnav-inner {
    max-width: 720px; margin: 0 auto;
    padding: 12px 24px;
    display: flex; align-items: center; gap: 16px;
  }
  .sectionnav .links { display: flex; gap: 22px; flex-shrink: 0; }
  .sectionnav .links a {
    font-size: 14px; color: var(--ink-3); text-decoration: none;
    padding: 6px 0; position: relative; font-weight: 500;
  }
  .sectionnav .links a:hover { color: var(--ink); }
  .sectionnav .links a.active { color: var(--ink); font-weight: 700; }
  .sectionnav .links a.active::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -13px;
    height: 2px; background: var(--ink);
  }
  .searchbox {
    flex: 1 1 auto; position: relative; min-width: 0;
  }
  .searchbox input {
    width: 100%; padding: 8px 14px 8px 34px;
    border: 1.5px solid var(--ink); border-radius: 999px;
    font: inherit; font-size: 13.5px; background: #fff;
    color: var(--ink); outline: none;
  }
  .searchbox input:focus { border-color: var(--ink); background: var(--paper); }
  .searchbox input::placeholder { color: var(--ink-3); }
  .search-dropdown {
    position: absolute; top: calc(100% + 6px); left: 0; right: 0;
    background: #fff; border: 1px solid var(--line); border-radius: 10px;
    box-shadow: 0 8px 24px rgba(17,24,39,.12);
    max-height: 360px; overflow-y: auto;
    display: none; z-index: 50;
  }
  .search-dropdown.show { display: block; }
  .search-dropdown .dd-item {
    padding: 10px 14px; cursor: pointer; font-size: 13.5px;
    display: flex; flex-direction: column; gap: 2px;
    border-bottom: 1px solid var(--line);
  }
  .search-dropdown .dd-item:last-child { border-bottom: 0; }
  .search-dropdown .dd-item:hover { background: var(--paper); }
  .search-dropdown .dd-provider {
    font-size: 11px; color: var(--ink-3); letter-spacing: .05em;
  }
  .search-dropdown .dd-title { color: var(--ink); }
  .search-dropdown .dd-empty {
    padding: 14px; color: var(--ink-3); font-size: 13px; text-align: center;
  }
  .searchbox .icon {
    position: absolute; left: 11px; top: 50%; transform: translateY(-50%);
    width: 14px; height: 14px; color: var(--ink-3); pointer-events: none;
  }
  .search-count {
    font-size: 12px; color: var(--ink-3); white-space: nowrap; flex-shrink: 0;
  }

  /* Highlight inside body text */
  .key {
    background: #fff3bf; color: #111;
    padding: 1px 5px; border-radius: 3px; font-weight: 600;
  }
  mark.hl {
    background: #ffe066; color: #111; padding: 0 2px; border-radius: 2px;
  }
  .step.no-match, .provider-intro.no-match { display: none; }
  .search-hint {
    display: none; padding: 40px 0; text-align: center; color: var(--ink-3);
    font-size: 14px;
  }

  /* Back to top */
  .backtop {
    position: fixed; right: 24px; bottom: 28px; z-index: 60;
    width: 42px; height: 42px; border-radius: 50%;
    background: #111; border: 1px solid #111;
    box-shadow: 0 4px 16px rgba(0,0,0,.18);
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    opacity: 0; pointer-events: none; transform: translateY(8px);
    transition: opacity .2s ease, transform .2s ease, background .2s ease;
    color: #fff;
  }
  .backtop.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .backtop:hover { background: #000; }
  .backtop svg { width: 18px; height: 18px; }

  /* Responsive */
  @media (max-width: 640px) {
    h1.title { font-size: 32px; }
    .hero { padding: 56px 0 32px; }
    .step { grid-template-columns: 28px 1fr; gap: 12px; }
    .tabs { gap: 16px; overflow-x: auto; flex-wrap: nowrap; }
  }

  /* Anchor offset for sticky nav */
  #s3, #webdav, #faq { scroll-margin-top: 80px; }