/* roulang page: index */
:root {
  --bg: #EFEAE3;
  --ink: #161311;
  --card: #F7F4EE;
  --line: #E3DBD1;
  --copper: #A15A3A;
  --teal: #2C6A64;
  --ochre: #9C4E42;
  --muted: #6E645C;
  --radius: 4px;
  --shadow: 0 10px 28px rgba(22,19,17,.06);
  --wide: 1120px;
  --ease: 200ms ease;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
button, input, textarea { font-family: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { letter-spacing: -0.03em; line-height: 1.25; font-weight: 640; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.container { width: min(var(--wide), calc(100% - 40px)); margin: 0 auto; }
.lead { max-width: 68ch; color: var(--ink); margin-top: 12px; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0; }
.text-link {
  color: var(--ink);
  background-image: linear-gradient(var(--copper), var(--copper));
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 0 1px;
  transition: background-size var(--ease), color var(--ease);
}
.text-link:hover, .text-link:focus-visible { background-size: 100% 1px; color: var(--copper); }
:focus-visible { outline: 2px solid var(--copper); outline-offset: 3px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--copper);
  font-size: 14px;
  line-height: 1;
  letter-spacing: 0.01em;
  transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
}
.btn:hover, .btn:focus-visible { background: var(--copper); color: var(--ink); border-color: var(--copper); }
.btn-line { background: transparent; color: var(--ink); }
.btn-line:hover, .btn-line:focus-visible { background: var(--copper); color: var(--ink); border-color: var(--copper); }
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 7px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 12px;
  line-height: 1;
  background: transparent;
}
.tag-teal { color: var(--teal); border-color: rgba(44,106,100,.35); }
.tag-ochre { color: var(--ochre); border-color: rgba(156,78,66,.35); }
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 40;
  background: rgba(239,234,227,.96);
  border-bottom: 1px solid var(--line);
}
.brand-row { height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 10px; min-width: 0; }
.logo svg { flex: 0 0 auto; }
.logo span { font-size: 18px; letter-spacing: -0.04em; font-weight: 680; white-space: nowrap; }
.brand-actions { display: flex; gap: 8px; flex: 0 0 auto; }
.icon-nav { border-top: 1px solid var(--line); }
.icon-nav ul { display: flex; justify-content: space-between; gap: 4px; }
.icon-nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 6px 12px;
  color: var(--ink);
  font-size: 13px;
  border-bottom: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}
.icon-nav a svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.6; }
.icon-nav a:hover, .icon-nav a:focus-visible { color: var(--copper); border-bottom-color: var(--copper); }
.icon-nav a.active { color: var(--copper); border-bottom-color: var(--copper); }
main { padding-top: 128px; }
.section { padding: 76px 0; }
.section + .section { border-top: 1px solid var(--line); }
.alt { background: var(--card); }
.kicker { color: var(--copper); font-size: 13px; letter-spacing: 0.08em; }
.hero { padding: 54px 0 36px; }
.hero-grid { display: grid; grid-template-columns: 1.45fr 0.85fr; gap: 48px; align-items: end; }
.hero h1 { font-size: clamp(36px, 4.6vw, 60px); max-width: 11em; }
.hero-copy { margin-top: 18px; max-width: 62ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.cue-track {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 18px 0 14px;
}
.cue-line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}
.cue-points { display: grid; gap: 14px; margin-top: 14px; }
.cue-points li { display: grid; grid-template-columns: 72px 1fr; gap: 10px; align-items: baseline; }
.cue-points strong { font-size: 15px; font-weight: 650; }
.cue-points span { color: var(--teal); font-size: 14px; }
.scan { padding: 22px 0; background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.scan-row { display: grid; grid-template-columns: 1.1fr 1.3fr 0.9fr; }
.metric { padding: 8px 22px; }
.metric + .metric { border-left: 1px solid var(--line); }
.metric em { display: block; font-style: normal; font-size: 12px; color: var(--muted); }
.metric b { display: block; margin-top: 4px; font-size: 22px; letter-spacing: -0.04em; font-weight: 680; animation: settle 220ms ease; }
.metric .mono { color: var(--ochre); display: inline-block; margin-top: 2px; }
.feature-head, .block-head { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: end; margin-bottom: 28px; }
.feature-list { display: grid; }
.feat {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
  transition: background var(--ease), border-color var(--ease);
}
.feat:last-child { border-bottom: 1px solid var(--line); }
.feat:hover { background: rgba(161,90,58,.04); }
.feat h3 { font-size: clamp(26px, 3vw, 36px); max-width: 8em; }
.feat-side { align-self: center; }
.feat-side p + p { margin-top: 6px; }
.feat-side .text-link { display: inline-block; margin-top: 12px; }
.pairs { display: grid; gap: 10px; margin-top: 22px; }
.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform var(--ease), border-color var(--ease);
}
.pair:hover { transform: translateY(-2px); border-color: var(--copper); }
.pair div { padding: 16px 18px 14px; }
.pair .bad { background: transparent; }
.pair .ok { border-left: 1px solid var(--line); }
.pair small { display: block; color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.pair .bad p { color: var(--ochre); font-family: var(--mono); font-size: 15px; line-height: 1.6; }
.pair .ok p { font-size: 20px; letter-spacing: -0.03em; }
.pair .ok i { color: var(--teal); font-style: normal; font-size: 12px; display: block; margin-top: 4px; }
.scene { border-top: 1px solid var(--ink); padding: 18px 0; display: grid; grid-template-columns: 180px 1fr auto; gap: 22px; align-items: baseline; }
.scene time { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.scene h3 { font-size: 28px; }
.demo-layout { display: grid; grid-template-columns: 1.4fr 0.6fr; gap: 28px; align-items: stretch; }
.stage {
  background: var(--ink);
  color: #EFEAE3;
  min-height: 360px;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.stage-mark {
  position: absolute;
  left: 24px;
  top: 22px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ochre);
}
.stage-frame {
  margin: 70px 28px 24px;
  border: 1px solid rgba(239,234,227,.18);
  flex: 1;
}
.subtitle-bar {
  margin: 0 28px 22px;
  border-top: 2px solid var(--copper);
  padding-top: 10px;
  font-size: 22px;
  letter-spacing: -0.03em;
  line-height: 1.45;
}
.steps { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: 36px 1fr; gap: 10px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.steps b { color: var(--copper); font-size: 18px; letter-spacing: -0.04em; }
.repair { display: grid; gap: 12px; margin-top: 8px; }
.sample {
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  background: var(--card);
}
.sample .label { font-size: 12px; margin-bottom: 8px; }
.sample.bad .label, .sample.bad p { color: var(--ochre); }
.sample.good { border-color: rgba(44,106,100,.35); }
.sample.good .label, .sample.good .state { color: var(--teal); }
.sample p { font-size: 22px; letter-spacing: -0.03em; line-height: 1.5; }
.sample.bad p { font-family: var(--mono); font-size: 16px; letter-spacing: 0; }
.case-grid { display: grid; grid-template-columns: 1.45fr 0.8fr; gap: 18px; }
.post {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background var(--ease), border-color var(--ease), transform var(--ease);
}
.post:hover { background: #FBF9F5; border-color: var(--copper); transform: translateY(-2px); }
.post h3 { font-size: 26px; }
.post-meta { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 13px; margin-top: auto; }
.price-layout { display: grid; grid-template-columns: 1.55fr 0.7fr; gap: 18px; align-items: stretch; }
.plan-table, .plan-side {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.plan-table { padding: 8px 8px 18px; }
.plan-table header, .plan-side header { padding: 18px 16px 8px; display: flex; justify-content: space-between; gap: 12px; align-items: end; }
.plan-table h3, .plan-side h3 { font-size: 28px; }
.price { font-size: 40px; letter-spacing: -0.05em; line-height: 1; }
.price small { font-size: 14px; letter-spacing: 0; color: var(--muted); margin-left: 4px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 16px; border-top: 1px solid var(--line); vertical-align: top; font-weight: 450; }
th { width: 28%; color: var(--muted); font-weight: 500; }
tr:hover td, tr:hover th { background: rgba(161,90,58,.04); }
.plan-actions { padding: 16px 16px 0; }
.plan-side { padding: 8px 18px 20px; display: flex; flex-direction: column; }
.plan-side ul { display: grid; gap: 8px; margin: 12px 0 18px; }
.plan-side li { padding-top: 8px; border-top: 1px solid var(--line); }
.plan-side .btn { margin-top: auto; }
.masonry { columns: 3; column-gap: 14px; }
.quote {
  break-inside: avoid;
  margin: 0 0 14px;
  padding: 16px 16px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--ease), border-color var(--ease);
}
.quote:hover { transform: translateY(-2px); border-color: var(--copper); }
.quote p { font-size: 16px; }
.quote footer { margin-top: 10px; color: var(--muted); font-size: 12px; }
.voice-grid { display: grid; grid-template-columns: 1.35fr 0.75fr; gap: 18px; }
.voice-main, .voice-side article {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.voice-main p { font-size: 22px; letter-spacing: -0.03em; line-height: 1.6; }
.voice-side { display: grid; gap: 12px; }
.voice-side article p { font-size: 15px; }
.catalog-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 22px; }
.catalog-grid a {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 148px;
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--ease), border-color var(--ease);
}
.catalog-grid a:hover, .catalog-grid a:focus-visible { transform: translateY(-2px); border-color: var(--copper); }
.catalog-grid svg { width: 26px; height: 26px; stroke: var(--copper); fill: none; stroke-width: 1.6; }
.catalog-grid strong { font-size: 18px; letter-spacing: -0.03em; }
.news-list { border-top: 1px solid var(--line); }
.post-row {
  display: grid;
  grid-template-columns: 92px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 16px 8px;
  border-bottom: 1px solid var(--line);
  transition: background var(--ease);
}
.post-row:hover { background: rgba(247,244,238,.9); }
.post-row h3 { font-size: 18px; font-weight: 620; }
.post-row .row-meta { color: var(--muted); font-size: 13px; text-align: right; white-space: nowrap; }
.formats { display: flex; flex-wrap: wrap; gap: 8px 0; margin-top: 16px; font-size: 18px; letter-spacing: -0.03em; }
.formats span { padding: 4px 0; }
.formats span + span::before { content: "·"; color: var(--copper); margin: 0 10px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 0;
  font-size: 18px;
  letter-spacing: -0.03em;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--copper); font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 0 16px; max-width: 78ch; color: var(--ink); }
.closer { background: var(--ink); color: #EFEAE3; padding: 42px 0; border-top: 0; }
.closer .container { display: flex; justify-content: space-between; gap: 24px; align-items: center; }
.closer h2 { font-size: clamp(28px, 3vw, 40px); max-width: 12em; }
.closer p { color: #D9D0C6; margin-top: 8px; }
.closer-actions { display: flex; gap: 10px; flex: 0 0 auto; }
.closer .btn { border-color: var(--copper); }
.closer .btn-line { color: #EFEAE3; border-color: #EFEAE3; background: transparent; }
.closer .btn-line:hover, .closer .btn-line:focus-visible { background: var(--copper); color: var(--ink); border-color: var(--copper); }
.site-footer { background: var(--card); border-top: 1px solid var(--line); padding: 42px 0 28px; }
.foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 24px; }
.site-footer h2 { font-size: 16px; margin-bottom: 10px; }
.site-footer a { display: inline-block; padding: 3px 0; }
.site-footer .text-link { display: inline; }
.legal { margin-top: 22px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; display: flex; justify-content: space-between; gap: 12px; }
@keyframes settle { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@media (max-width: 1200px) {
  .container { width: min(var(--wide), calc(100% - 32px)); }
}
@media (max-width: 1024px) {
  .hero-grid, .demo-layout, .case-grid, .price-layout, .voice-grid, .feature-head, .block-head { grid-template-columns: 1fr; gap: 18px; }
  .feat { grid-template-columns: 1fr; gap: 8px; }
  .masonry { columns: 2; }
  .catalog-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .brand-row { height: auto; min-height: 64px; padding: 10px 0; flex-wrap: wrap; }
  .icon-nav ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
  .icon-nav a { border-bottom: 2px solid transparent; padding: 12px 4px; }
  main { padding-top: 214px; }
  .scene { grid-template-columns: 1fr; gap: 4px; }
  .scan-row { grid-template-columns: 1fr; }
  .metric { padding: 12px 0; }
  .metric + .metric { border-left: 0; border-top: 1px solid var(--line); }
  .post-row { grid-template-columns: 1fr; gap: 6px; }
  .post-row .row-meta { text-align: left; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero h1 { font-size: 36px; }
  .closer .container, .legal { flex-direction: column; align-items: flex-start; }
  .pair { grid-template-columns: 1fr; }
  .pair .ok { border-left: 0; border-top: 1px solid var(--line); }
}
@media (max-width: 640px) {
  .container { width: calc(100% - 28px); }
  .masonry, .catalog-grid, .foot-grid { columns: 1; grid-template-columns: 1fr; }
  .logo span { font-size: 15px; white-space: normal; }
  .brand-actions .btn { padding: 0 10px; }
  .subtitle-bar { font-size: 18px; }
}
@media (max-width: 520px) {
  .hero-actions, .closer-actions, .brand-actions { width: 100%; }
  .hero-actions .btn, .closer-actions .btn { flex: 1; }
  .cue-points li { grid-template-columns: 64px 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* roulang page: category1 */
:root {
  --bg: #EFEAE3;
  --ink: #161311;
  --card: #F7F4EE;
  --line: #E3DBD1;
  --copper: #A15A3A;
  --teal: #2C6A64;
  --ochre: #9C4E42;
  --muted: #6E645C;
  --radius: 4px;
  --shadow: 0 10px 28px rgba(22,19,17,.06);
  --wide: 1120px;
  --ease: 200ms ease;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
/* roulang page: category1 */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
button, input, textarea { font-family: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { letter-spacing: -0.04em; line-height: 1.28; font-weight: 680; }
ul { list-style: none; margin: 0; padding: 0; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--copper); outline-offset: 2px; }
.container { width: min(var(--wide), calc(100% - 40px)); margin: 0 auto; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 12px; letter-spacing: 0; }
.text-link {
  color: var(--ink);
  background-image: linear-gradient(var(--copper), var(--copper));
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 0 1px;
  transition: background-size var(--ease), color var(--ease);
}
.text-link:hover, .text-link:focus-visible { background-size: 100% 1px; color: var(--copper); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--copper);
  font-size: 14px;
  line-height: 1;
  letter-spacing: 0.01em;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}
.btn:hover, .btn:focus-visible { background: var(--copper); color: var(--ink); border-color: var(--copper); }
.btn-line { background: transparent; color: var(--ink); }
.btn-line:hover, .btn-line:focus-visible { background: var(--copper); color: var(--ink); border-color: var(--copper); }
.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 22px;
  padding: 0 7px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 12px;
  line-height: 1;
  background: transparent;
  white-space: nowrap;
}
.tag-teal { color: var(--teal); border-color: rgba(44,106,100,.35); }
.tag-ochre { color: var(--ochre); border-color: rgba(156,78,66,.35); }
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 40;
  background: rgba(239,234,227,.96);
  border-bottom: 1px solid var(--line);
}
.brand-row { height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 10px; min-width: 0; }
.logo svg { flex: 0 0 auto; }
.logo span { font-size: 18px; letter-spacing: -0.04em; font-weight: 680; white-space: nowrap; }
.brand-actions { display: flex; gap: 8px; flex: 0 0 auto; }
.icon-nav { border-top: 1px solid var(--line); }
.icon-nav ul { display: flex; justify-content: space-between; gap: 4px; }
.icon-nav li { flex: 1; display: flex; }
.icon-nav a {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 6px 12px;
  color: var(--ink);
  font-size: 13px;
  border-bottom: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}
.icon-nav a svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.6; }
.icon-nav a:hover, .icon-nav a:focus-visible { color: var(--copper); border-bottom-color: var(--copper); }
.icon-nav a.active { color: var(--copper); border-bottom-color: var(--copper); }
main { padding-top: 128px; }
.section { padding: 76px 0; }
.section + .section { border-top: 1px solid var(--line); }
.head-section { padding: 36px 0 28px; }
.head-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 28px; align-items: end; }
.head-section h1 { font-size: clamp(32px, 4vw, 48px); max-width: 12em; }
.head-sub { margin-top: 10px; max-width: 36em; }
.head-meta { text-align: right; color: var(--muted); font-size: 13px; min-width: 148px; }
.head-meta strong {
  display: block;
  margin-top: 4px;
  color: var(--ink);
  font-size: 32px;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}
.filter-section { padding: 16px 0; background: #E7E0D6; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; justify-content: space-between; }
.filter-group { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.filter-label { font-size: 12px; color: var(--muted); margin-right: 2px; }
.chip {
  min-height: 32px;
  padding: 0 10px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-size: 13px;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}
.chip:hover, .chip:focus-visible { border-color: var(--copper); color: var(--copper); }
.chip.is-on { border-color: var(--copper); color: var(--copper); background: var(--card); }
.list-section { padding-top: 42px; }
.post-list { border-top: 1px solid var(--line); }
.post-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 18px 8px;
  border-bottom: 1px solid var(--line);
  transition: background var(--ease);
}
.post-row:hover { background: rgba(161,90,58,.06); }
.post-row[hidden] { display: none; }
.post-row h2 { font-size: 20px; font-weight: 680; }
.row-sub { margin-top: 4px; color: var(--ink); }
.row-facts { margin-top: 4px; color: var(--muted); font-size: 13px; }
.sample-bad { color: var(--ochre); }
.sample-ok { color: var(--teal); }
.post-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; color: var(--muted); font-size: 13px; white-space: nowrap; }
.more-row { padding-top: 18px; }
.note-section { background: var(--card); }
.note-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 36px; align-items: start; }
.block-title { font-size: clamp(28px, 3vw, 40px); max-width: 14em; }
.note-copy { margin-top: 14px; max-width: 46ch; }
.note-points { margin-top: 22px; display: grid; gap: 14px; }
.note-points article { padding-top: 14px; border-top: 1px solid var(--line); }
.note-points h3 { font-size: 18px; }
.note-points p { margin-top: 4px; }
.mini-stage {
  background: var(--ink);
  color: #EFEAE3;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-height: 280px;
  padding: 22px 22px 18px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.mini-kicker { font-family: var(--mono); font-size: 12px; color: var(--ochre); margin-bottom: auto; }
.mini-bad { margin: 28px 0 18px; color: #E7C2B8; font-family: var(--mono); font-size: 13px; line-height: 1.6; word-break: break-all; }
.mini-sub {
  border-top: 2px solid var(--copper);
  padding-top: 10px;
  font-size: 22px;
  letter-spacing: -0.03em;
  line-height: 1.45;
}
.mini-sub span { color: #8FCFC6; }
.note-link { display: inline-block; margin-top: 16px; }
.deep-grid { display: grid; grid-template-columns: 1.45fr 0.8fr; gap: 14px; align-items: stretch; }
.deep-stack { display: grid; gap: 14px; }
.deep-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 180px;
  transition: transform var(--ease), border-color var(--ease);
}
.deep-card:hover { transform: translateY(-2px); border-color: var(--copper); }
.deep-wide { min-height: 100%; justify-content: space-between; }
.deep-card h2, .deep-card h3 { font-size: 26px; }
.deep-stack h3 { font-size: 20px; }
.deep-card p { max-width: 48ch; }
.card-foot { display: flex; justify-content: space-between; gap: 12px; align-items: center; margin-top: auto; color: var(--muted); font-size: 13px; }
.path-list { border-top: 1px solid var(--line); margin-top: 22px; }
.path-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 16px 8px;
  border-bottom: 1px solid var(--line);
  transition: background var(--ease);
}
.path-item:hover { background: rgba(161,90,58,.06); }
.path-item strong { display: block; font-size: 18px; letter-spacing: -0.03em; font-weight: 680; }
.path-item span { color: var(--muted); font-size: 13px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:first-of-type { border-top: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 0;
  font-size: 18px;
  letter-spacing: -0.03em;
  font-weight: 680;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--copper); font-weight: 500; font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 16px; max-width: 68ch; }
.return-bar { background: var(--ink); color: #EFEAE3; border-top: 0; }
.return-inner { display: flex; justify-content: space-between; gap: 28px; align-items: center; }
.return-inner h2 { font-size: clamp(26px, 3vw, 36px); max-width: 12em; }
.return-inner p { margin-top: 8px; max-width: 46ch; color: #E7E0D6; }
.return-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.return-bar .btn { background: var(--copper); color: var(--ink); border-color: var(--copper); }
.return-bar .btn:hover, .return-bar .btn:focus-visible { background: #EFEAE3; color: var(--ink); border-color: #EFEAE3; }
.return-bar .btn-line { background: transparent; color: #EFEAE3; border-color: rgba(239,234,227,.45); }
.return-bar .btn-line:hover, .return-bar .btn-line:focus-visible { background: var(--copper); color: var(--ink); border-color: var(--copper); }
.site-footer { border-top: 1px solid var(--line); padding: 48px 0 20px; background: #E7E0D6; }
.foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 0.9fr 1fr; gap: 28px; }
.foot-grid h2 { font-size: 16px; margin-bottom: 8px; }
.foot-grid p { color: var(--ink); }
.legal {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
@media (max-width: 1200px) {
  .deep-card h2 { font-size: 24px; }
}
@media (max-width: 1024px) {
  .note-grid, .deep-grid, .foot-grid { grid-template-columns: 1fr 1fr; }
  .deep-stack { grid-template-columns: 1fr 1fr; }
  .deep-wide { grid-column: 1 / -1; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .icon-nav ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
  main { padding-top: 232px; }
  .head-grid, .return-inner, .note-grid { grid-template-columns: 1fr; }
  .head-meta, .post-meta { text-align: left; align-items: flex-start; }
  .return-inner { align-items: flex-start; }
  .deep-grid, .deep-stack, .foot-grid { grid-template-columns: 1fr; }
  .deep-wide { grid-column: auto; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .post-row, .path-item { grid-template-columns: 1fr; gap: 8px; }
  .logo span { font-size: 16px; }
}
@media (max-width: 640px) {
  .container { width: min(var(--wide), calc(100% - 28px)); }
  .brand-row { height: auto; min-height: 64px; padding: 10px 0; }
  .logo span { font-size: 14px; }
  .btn { padding: 0 10px; }
  main { padding-top: 248px; }
  .head-section h1 { font-size: 32px; }
  .mini-sub { font-size: 18px; }
}
@media (max-width: 520px) {
  .brand-actions { gap: 6px; }
  .filter-bar { align-items: flex-start; }
  .legal { flex-direction: column; }
  main { padding-top: 256px; }
}