/* 新手怎么用 · 跟现场本同一套纸 */
.how-body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Geist, system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", sans-serif;
}
.how-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}
.how-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 28px;
}
.how-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}
.how-brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 0 0 1px var(--line);
}
.how-brand span {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-weight: 700;
  font-size: 14px;
}
.how-top a.how-back {
  color: var(--ink-soft);
  font-size: 13px;
}
.how-wrap h1 {
  font-size: 28px;
  font-weight: 650;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
}
.how-lead {
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.55;
  margin: 0 0 28px;
}
.how-wrap h2 {
  font-size: 18px;
  font-weight: 650;
  margin: 36px 0 12px;
  letter-spacing: -0.02em;
}
.how-wrap h3 {
  font-size: 15px;
  font-weight: 650;
  margin: 22px 0 8px;
}
.how-wrap p,
.how-wrap li {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
}
.how-wrap p { margin: 0 0 12px; }
.how-wrap ul, .how-wrap ol { margin: 0 0 14px; padding-left: 1.2em; }
.how-wrap a { color: var(--accent); }
.how-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0 8px;
}
@media (max-width: 640px) {
  .how-two { grid-template-columns: 1fr; }
}
.how-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
}
.how-card h3 { margin-top: 0; }
.how-card p:last-child { margin-bottom: 0; }
.how-muted { color: var(--ink-soft); font-size: 13px !important; }
.how-flow {
  list-style: none;
  padding: 0;
  margin: 12px 0 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--panel);
}
.how-flow li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  list-style: none;
}
.how-flow li:last-child { border-bottom: 0; }
.how-n {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  padding-top: 2px;
}
.how-chat {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  margin: 0 0 16px;
}
.how-chat p { margin: 0 0 10px; font-size: 14px; }
.how-chat p:last-child { margin-bottom: 0; }
.how-you { color: var(--ink); }
.how-you::before { content: "你 · "; color: var(--accent); font-weight: 650; }
.how-bot { color: var(--ink-soft); }
.how-bot::before { content: "FDE-Agent · "; color: var(--ink-faint); font-weight: 650; }
.how-note {
  font-size: 13px;
  color: var(--ink-faint);
  margin: -6px 0 16px !important;
}
.how-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 0 0 16px;
}
.how-table th,
.how-table td {
  text-align: left;
  vertical-align: top;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}
.how-table th { color: var(--ink-faint); font-weight: 600; font-size: 12px; }
.how-dont {
  color: var(--red);
}
.how-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  font-size: 13px;
}
.how-toc a { color: var(--ink-soft); text-decoration: none; }
.how-toc a:hover { color: var(--accent); }

.how-fig {
  margin: 10px 0 28px;
  padding: 10px 6px 6px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow-x: auto;
}
.how-fig figcaption {
  font-size: 12px;
  color: var(--ink-faint);
  text-align: center;
  margin: 0 0 4px;
}
.how-svg {
  display: block;
  width: 100%;
  height: auto;
  min-width: 300px;
}
.how-svg .n {
  fill: var(--bg);
  stroke: var(--line);
  stroke-width: 1.4;
}
.how-svg .n-go {
  fill: var(--accent-bg);
  stroke: var(--accent);
}
.how-svg .n-wait {
  fill: var(--bg);
  stroke: var(--amber);
}
.how-svg .n-stop {
  fill: var(--bg);
  stroke: var(--ink-faint);
  stroke-dasharray: 4 3;
}
.how-svg .dia {
  fill: var(--bg);
  stroke: var(--amber);
  stroke-width: 1.6;
}
.how-svg text {
  fill: var(--ink);
  font-size: 13px;
  font-family: Geist, system-ui, "PingFang SC", "Hiragino Sans GB", sans-serif;
}
.how-svg text.sm {
  fill: var(--ink-faint);
  font-size: 11px;
}
.how-svg text.lab {
  fill: var(--amber);
  font-size: 11px;
  font-weight: 650;
}
.how-svg .edge {
  stroke: var(--ink-soft);
  fill: none;
  stroke-width: 1.5;
  marker-end: url(#how-arr);
}
.how-svg .edge-back {
  stroke: var(--amber);
  fill: none;
  stroke-width: 1.5;
  marker-end: url(#how-arr-am);
}
.how-svg .edge-mute {
  stroke: var(--ink-faint);
  fill: none;
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
  marker-end: url(#how-arr-mute);
}
.how-manual .how-fig {
  background: var(--bg);
}
.how-manual .how-svg path,
.how-manual .how-svg line {
  fill: none;
}
.how-manual .how-svg .n,
.how-manual .how-svg .n-wait,
.how-manual .how-svg .n-stop,
.how-manual .how-svg .dia {
  fill: var(--panel);
}
.how-svg .edge-plain {
  stroke: var(--ink-soft);
  fill: none;
  stroke-width: 1.5;
}

.how-key {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  font-size: 12px;
  color: var(--ink-soft);
}
.how-key li { display: flex; align-items: center; gap: 6px; }
.swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 2px solid var(--line);
  background: var(--panel);
}
.swatch.you { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 35%, var(--bg)); }
.swatch.agent { border-color: var(--amber); background: color-mix(in srgb, var(--amber) 28%, var(--bg)); }
.swatch.go { border-color: var(--accent); background: var(--accent); }
.swatch.stop { border-style: dashed; border-color: var(--ink-faint); }

.who {
  display: inline-block;
  margin-right: 6px;
  padding: 0 5px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.02em;
}
.who.you { color: var(--accent); background: var(--accent-bg); }
.who.agent { color: var(--amber); background: transparent; box-shadow: inset 0 0 0 1px var(--amber); }
.who.admin, .who.web { color: var(--ink); background: transparent; box-shadow: inset 0 0 0 1px var(--ink-faint); }
.who.host { color: var(--accent); background: transparent; box-shadow: inset 0 0 0 1px var(--accent); }

.node, .bubble, .path, .see, .zone, .stop-card, .mini {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.node, .bubble { padding: 10px 12px; font-size: 13px; line-height: 1.5; }
.node strong, .bubble strong { display: block; font-size: 14px; margin-bottom: 2px; }
.node .sub, .bubble .sub { display: block; margin-top: 4px; color: var(--ink-faint); font-size: 12px; }
.node.you, .bubble.you { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 16%, var(--bg)); }
.node.agent, .bubble.agent { border-color: var(--amber); background: color-mix(in srgb, var(--amber) 10%, var(--bg)); }
.node.go, .bubble.host { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 22%, var(--bg)); }
.ask-note {
  margin: 0 0 8px;
  max-width: 640px;
  text-align: center;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ink-soft);
}
.node.stop, .stop-card { border-style: dashed; }

.river { display: flex; flex-direction: column; align-items: center; gap: 0; }
.river-in, .fork {
  display: grid;
  gap: 10px;
  width: 100%;
}
.river-in { grid-template-columns: repeat(3, 1fr); }
.fork { grid-template-columns: repeat(3, 1fr); margin-top: 4px; }
.vlink {
  width: 2px;
  height: 18px;
  background: var(--ink-faint);
  position: relative;
}
.vlink::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--ink-faint);
}
.node.hub { width: min(420px, 100%); text-align: center; }
.ask-svg { display: block; margin: 6px 0 2px; overflow: visible; }
.ask-svg polygon { fill: var(--bg); stroke: var(--amber); stroke-width: 1.6; }
.ask-svg text {
  fill: var(--ink);
  font-size: 13px;
  font-family: Geist, system-ui, "PingFang SC", "Hiragino Sans GB", sans-serif;
}
.ask-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 128px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  width: 100%;
}
.how-wrap .ask-side {
  margin: 0;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ink-soft);
}
.how-wrap .ask-note { font-size: 12px; }
.ask-side.l { text-align: right; }
.ask-side.r { text-align: left; }
.ask-side b { color: var(--ink); font-weight: 650; }
.river .node.hub { width: min(560px, 100%); }

.join, .see-row, .zones, .stops, .minis {
  display: grid;
  gap: 10px;
}
.join, .minis { grid-template-columns: 1fr 1fr 1fr; }
.join.two { grid-template-columns: 1fr 1fr; }
.see-row { grid-template-columns: repeat(3, 1fr); margin-top: 10px; }
.zones, .stops { grid-template-columns: 1fr 1fr; }
.path, .see, .zone, .stop-card, .mini { padding: 12px 14px; }
.path h3, .see h3, .zone h3, .mini h3, .stop-card h3 {
  margin: 0 0 8px;
  font-size: 14px;
}
.path ol { margin: 0; padding: 0; list-style: none; }
.path li {
  position: relative;
  margin: 0 0 8px;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.5;
}
.path li:last-child { margin-bottom: 0; }
.path li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: -12px;
  width: 1px;
  background: var(--line);
}
.path li:last-child::before { bottom: auto; height: 0; }
.path li::after {
  content: "";
  position: absolute;
  left: 1px;
  top: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}
.see p, .zone p, .mini p, .stop-card p { margin: 0; font-size: 13px; line-height: 1.5; }
.see .role { color: var(--accent); font-weight: 650; font-size: 13px; }

.rail-scroll, .bone-scroll { overflow-x: auto; }
.rail {
  display: grid;
  grid-template-columns: repeat(6, minmax(140px, 1fr));
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  min-width: 860px;
  position: relative;
}
.rail::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 4%;
  right: 4%;
  height: 2px;
  background: var(--line);
}
.rail li {
  position: relative;
  padding: 28px 8px 8px;
  text-align: center;
}
.rail .num {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: #04140c;
  font-size: 12px;
  font-weight: 700;
  line-height: 22px;
  z-index: 1;
}
html[data-fde-theme="light"] .rail .num { color: #fff; }
.rail strong { display: block; font-size: 14px; margin-bottom: 2px; }
.rail em {
  display: block;
  font-style: normal;
  font-size: 11px;
  color: var(--ink-faint);
  margin-bottom: 6px;
}
.rail p { margin: 0; font-size: 12px; line-height: 1.45; color: var(--ink-soft); }
.unset {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 10px;
  border: 1px dashed var(--ink-faint);
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 12px;
}

.bone { min-width: 860px; }
.bone-3 { min-width: 680px; }
.says, .dos {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.bone-3 .says, .bone-3 .dos { grid-template-columns: repeat(3, 1fr); }
.mid { position: relative; height: 28px; }
.ticks {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: 100%;
}
.bone-3 .ticks { grid-template-columns: repeat(3, 1fr); }
.ticks span {
  justify-self: center;
  width: 2px;
  height: 100%;
  background: var(--ink-faint);
}
.spine {
  position: absolute;
  left: 8%;
  right: 4%;
  top: 50%;
  height: 2px;
  background: var(--ink-soft);
}
.spine::after {
  content: "";
  position: absolute;
  right: -7px;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--ink-soft);
}
.slip {
  display: grid;
  gap: 10px;
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
.slip-page {
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 10px 12px;
}
.slip-page b { display: block; font-size: 14px; margin-bottom: 8px; }
.slip-page dl {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px 16px;
  margin: 0;
}
.slip-page dt { color: var(--ink-faint); font-size: 12px; }
.slip-page dd { margin: 2px 0 0; font-size: 14px; }
.slip p { margin: 0; font-size: 13px; line-height: 1.5; color: var(--ink-soft); }
.stops { margin-bottom: 18px; }

@media (max-width: 800px) {
  .river-in, .fork, .join, .join.two, .see-row, .zones, .stops, .minis, .slip-page dl, .ask-row {
    grid-template-columns: 1fr;
  }
  .ask-side.l, .ask-side.r { text-align: center; }
  .node.hub { width: 100%; }
}