:root {
  --wa-green: #25D366;
  --wa-green-deep: #128C7E;
  --wa-green-soft: #E8F8EF;
  --meta-blue: #0866FF;
  --meta-blue-soft: #E7F0FF;

  --ink-900: #0B1220;
  --ink-700: #1F2A37;
  --ink-600: #374151;
  --ink-500: #4B5563;
  --ink-400: #6B7280;
  --ink-300: #9CA3AF;
  --ink-200: #D1D5DB;
  --ink-100: #E5E7EB;
  --ink-50:  #F3F4F6;
  --bg:      #FFFFFF;
  --bg-soft: #F7F8FB;
  --bg-card: #FFFFFF;
  --border:  #E6E8EE;

  --warn-bg: #FFF7E6;
  --warn-bd: #FFE0A6;
  --warn-fg: #8A5A00;
  --info-bg: #EAF1FF;
  --info-bd: #BCD2FF;
  --info-fg: #133C8E;
  --ok-bg:   #E6F7EE;
  --ok-bd:   #B6E7C9;
  --ok-fg:   #0E6B3A;

  --radius:    12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(16,24,40,.05);
  --shadow-md: 0 4px 16px -2px rgba(16,24,40,.08), 0 2px 4px -2px rgba(16,24,40,.04);
  --shadow-lg: 0 20px 40px -16px rgba(16,24,40,.18), 0 4px 12px -2px rgba(16,24,40,.06);

  --font-sans: "Inter", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container: 1180px;
  --content:   780px;
  --toc-w:     260px;

  --ease: cubic-bezier(.16, 1, .3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
html[data-lang="en"] body { font-family: "Inter", system-ui, -apple-system, sans-serif; }

a { color: var(--meta-blue); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: #0451CC; text-decoration: underline; text-underline-offset: 3px; }
code {
  font-family: var(--font-mono);
  font-size: .9em;
  background: var(--ink-50);
  border: 1px solid var(--ink-100);
  padding: 1px 6px;
  border-radius: 6px;
  color: #1F2937;
}
em { font-style: normal; font-weight: 600; color: var(--ink-900); }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--ink-900); color: #fff; padding: 8px 12px;
  border-radius: 0 0 8px 8px; z-index: 100;
}
.skip:focus { left: 12px; }

/* ===== topbar ===== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 28px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink-900); }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: grid; place-items: center;
  width: 36px; height: 36px;
  background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
  border-radius: 10px;
  box-shadow: 0 6px 16px -6px rgba(37,211,102,.6), inset 0 1px 0 rgba(255,255,255,.4);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-title { font-weight: 700; font-size: 15px; letter-spacing: -.01em; }
.brand-sub { font-size: 12px; color: var(--ink-500); font-weight: 500; }

.top-nav { display: flex; justify-content: center; gap: 28px; }
.top-nav a { color: var(--ink-600); font-size: 14px; font-weight: 500; }
.top-nav a:hover { color: var(--ink-900); text-decoration: none; }

.lang-toggle {
  display: inline-flex; gap: 2px;
  background: var(--ink-50);
  padding: 3px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.lang-toggle button {
  border: 0; background: transparent;
  font: inherit; cursor: pointer;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px; font-weight: 600;
  color: var(--ink-500);
  transition: all .2s var(--ease);
}
.lang-toggle button.is-active {
  background: #fff; color: var(--ink-900);
  box-shadow: var(--shadow-sm), 0 0 0 1px var(--border);
}
.lang-toggle button:hover:not(.is-active) { color: var(--ink-700); }

.progress {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: transparent;
}
.progress span {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--wa-green) 0%, var(--meta-blue) 100%);
  width: 0%;
  transition: width .12s linear;
}

/* ===== hero ===== */
.hero {
  background:
    radial-gradient(1100px 500px at 80% -10%, rgba(37,211,102,.10), transparent 60%),
    radial-gradient(1000px 600px at -10% 30%, rgba(8,102,255,.08), transparent 60%),
    linear-gradient(180deg, #FBFDFF 0%, #FFFFFF 100%);
  border-bottom: 1px solid var(--border);
  padding: 88px 28px 72px;
}
.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px; color: var(--ink-600); font-weight: 500;
  box-shadow: var(--shadow-sm);
}
.kicker .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--wa-green); box-shadow: 0 0 0 4px rgba(37,211,102,.18); }

.hero h1 {
  margin: 22px 0 18px;
  font-size: clamp(2.2rem, 1.4rem + 3.4vw, 4rem);
  line-height: 1.1;
  letter-spacing: -.025em;
  color: var(--ink-900);
  font-weight: 800;
  max-width: 18ch;
}
.lede {
  max-width: 60ch;
  font-size: clamp(1rem, .96rem + .25vw, 1.18rem);
  color: var(--ink-500);
  line-height: 1.7;
  margin: 0 0 32px;
}

.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: all .2s var(--ease);
  cursor: pointer;
  text-decoration: none;
}
.btn.primary {
  background: var(--ink-900);
  color: #fff;
  box-shadow: 0 8px 20px -8px rgba(11,18,32,.4);
}
.btn.primary:hover { transform: translateY(-1px); background: #000; text-decoration: none; }
.btn.ghost {
  background: #fff;
  border-color: var(--border);
  color: var(--ink-700);
}
.btn.ghost:hover { border-color: var(--ink-400); text-decoration: none; }

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 700px;
  margin-top: 56px;
  border-top: 1px solid var(--border);
  padding-top: 28px;
}
.hero-meta > div { display: flex; flex-direction: column; gap: 4px; }
.hero-meta b {
  font-size: clamp(1.25rem, 1rem + 1vw, 1.6rem);
  color: var(--ink-900);
  letter-spacing: -.015em;
  font-weight: 700;
}
.hero-meta span { font-size: 13px; color: var(--ink-500); }

/* ===== layout ===== */
.layout {
  display: grid;
  grid-template-columns: var(--toc-w) minmax(0, 1fr);
  gap: 56px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 28px 80px;
}

.toc {
  position: sticky;
  top: 92px;
  align-self: start;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  font-size: 13.5px;
  padding-right: 8px;
}
.toc-title {
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 11px;
  color: var(--ink-400);
  font-weight: 700;
  margin-bottom: 10px;
}
.toc-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.toc-list a {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--ink-500);
  font-weight: 500;
  border-left: 2px solid transparent;
  transition: all .15s var(--ease);
}
.toc-list a:hover { background: var(--ink-50); color: var(--ink-900); text-decoration: none; }
.toc-list a.is-active {
  color: var(--ink-900);
  background: linear-gradient(90deg, rgba(37,211,102,.10), transparent);
  border-left-color: var(--wa-green);
}

.content { min-width: 0; }

/* ===== sections ===== */
.sec { padding-top: 28px; margin-top: 28px; }
.sec + .sec { border-top: 1px solid var(--border); padding-top: 64px; margin-top: 64px; }
.sec-head { margin-bottom: 32px; }
.sec-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--wa-green-deep);
  background: var(--wa-green-soft);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: .04em;
}
.sec-head h2 {
  font-size: clamp(1.6rem, 1.1rem + 1.4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--ink-900);
  line-height: 1.2;
  margin: 0 0 12px;
}
.sec-sub {
  font-size: 16px;
  color: var(--ink-500);
  max-width: 64ch;
  margin: 0;
}
.sub-h {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-900);
  margin: 36px 0 16px;
  display: flex; align-items: center; gap: 10px;
}
.sub-h::before {
  content: "";
  width: 4px; height: 18px;
  background: var(--wa-green);
  border-radius: 2px;
}

/* ===== overview / roles ===== */
.role-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}
.role-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 24px 20px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.role-card.is-focus {
  border-color: var(--wa-green);
  box-shadow: 0 0 0 1px var(--wa-green), 0 16px 32px -16px rgba(37,211,102,.4);
}
.role-card::before {
  content: "";
  position: absolute; left: 0; top: 0; right: 0; height: 3px;
}
.role-card.accent-green::before { background: linear-gradient(90deg, #25D366, #128C7E); }
.role-card.accent-blue::before  { background: linear-gradient(90deg, #0866FF, #1B3CC4); }

.role-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-400);
  margin-bottom: 6px;
}
.role-card h3 { margin: 0 0 14px; font-size: 18px; color: var(--ink-900); font-weight: 700; }
.role-card ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 8px;
  color: var(--ink-600);
  font-size: 14.5px;
}
.role-card li { position: relative; padding-left: 22px; }
.role-card li::before {
  content: "";
  position: absolute; left: 0; top: 9px;
  width: 14px; height: 6px;
  border-left: 2px solid var(--wa-green);
  border-bottom: 2px solid var(--wa-green);
  transform: rotate(-45deg);
}
.role-card.accent-blue li::before { border-color: var(--meta-blue); }

.path-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}
.path-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
}
.path-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--meta-blue);
  background: var(--meta-blue-soft);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 8px;
}
.path-card h4 { margin: 0 0 8px; font-size: 17px; color: var(--ink-900); }
.path-card p { font-size: 14.5px; color: var(--ink-500); margin: 0 0 16px; line-height: 1.6; }
.path-diagram {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.path-diagram .node {
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--ink-50);
  color: var(--ink-700);
}
.path-diagram .node.meta { background: var(--meta-blue); color: #fff; border-color: var(--meta-blue); }
.path-diagram .node.bsp  { background: #FFF5E5; color: #8A5A00; border-color: #FFD792; }
.path-diagram .node.tp   { background: var(--wa-green-soft); color: var(--wa-green-deep); border-color: #A6E7BD; }
.path-diagram .node.ec   { background: #F4ECFF; color: #5B2BB8; border-color: #D9C2FF; }
.path-diagram .arrow { color: var(--ink-300); font-weight: 700; font-size: 14px; }
.diagram-note { flex-basis: 100%; font-size: 12.5px; color: var(--ink-400); margin-top: 8px; }

/* ===== checklist ===== */
.checklist {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 12px;
}
.checklist li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
}
.check-num {
  display: grid; place-items: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--wa-green-soft);
  color: var(--wa-green-deep);
  font-weight: 700;
  font-family: var(--font-mono);
}
.checklist h4 { margin: 0 0 4px; font-size: 16px; color: var(--ink-900); }
.checklist p  { margin: 0; font-size: 14.5px; color: var(--ink-500); }

/* ===== callouts ===== */
.callout {
  margin: 24px 0;
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}
.callout strong { font-weight: 700; }
.callout p { margin: 0; }
.callout.info    { background: var(--info-bg); border-color: var(--info-bd); color: var(--info-fg); }
.callout.info strong { color: var(--info-fg); }
.callout.warn    { background: var(--warn-bg); border-color: var(--warn-bd); color: var(--warn-fg); }
.callout.warn strong { color: var(--warn-fg); }
.callout.success { background: var(--ok-bg);   border-color: var(--ok-bd);   color: var(--ok-fg); }
.callout.success strong { color: var(--ok-fg); }

/* ===== steps ===== */
.step-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  margin: 16px 0;
}
@media (max-width: 880px) { .step-grid { grid-template-columns: 1fr; } }

.step-list {
  counter-reset: stepc;
  list-style: none;
  padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 14px;
}
.step-list li {
  position: relative;
  padding-left: 40px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-600);
  counter-increment: stepc;
}
.step-list li::before {
  content: counter(stepc);
  position: absolute; left: 0; top: 1px;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--ink-900);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: grid; place-items: center;
  font-family: var(--font-mono);
}
.step.sec .step-list li::before {
  background: linear-gradient(135deg, var(--wa-green), var(--wa-green-deep));
}

.bullets {
  padding-left: 22px;
  margin: 8px 0 20px;
  color: var(--ink-600);
}
.bullets li { margin: 6px 0; }
.bullets li::marker { color: var(--wa-green); }

/* ===== screenshot frame ===== */
.shot {
  margin: 0;
  background: linear-gradient(180deg, #FAFBFD 0%, #F4F6FA 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-md);
}
.shot img {
  width: 100%; height: auto;
  display: block;
  border-radius: 10px;
  box-shadow: 0 4px 16px -4px rgba(16,24,40,.16), 0 0 0 1px rgba(16,24,40,.06);
  background: #fff;
}
.shot figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-500);
  line-height: 1.5;
  text-align: center;
}
.shot.wide { margin: 24px 0; }

/* ===== tips grid ===== */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 16px 0 8px;
}
.tip {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 16px 14px;
  position: relative;
}
.tip::before {
  content: "";
  position: absolute; left: 16px; top: 16px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--wa-green);
}
.tip h5 { margin: 0 0 6px; font-size: 14.5px; color: var(--ink-900); padding-left: 18px; }
.tip p  { margin: 0; font-size: 13.5px; color: var(--ink-500); line-height: 1.55; }
.tip.warn::before { background: #F59E0B; }

/* ===== sources ===== */
.src-row {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--border);
}
.src {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--meta-blue-soft);
  border: 1px solid #C7DCFF;
  color: var(--meta-blue);
  padding: 7px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  transition: all .15s var(--ease);
}
.src:hover {
  background: var(--meta-blue);
  color: #fff;
  border-color: var(--meta-blue);
  text-decoration: none;
}
.src .ext { font-size: 11px; opacity: .8; }

/* ===== support grid ===== */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}
.support-card {
  display: flex; flex-direction: column; gap: 6px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--ink-700);
  transition: all .2s var(--ease);
  text-decoration: none;
}
.support-card:hover {
  transform: translateY(-2px);
  border-color: var(--meta-blue);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}
.support-card h4 {
  margin: 0;
  font-size: 15px;
  color: var(--ink-900);
  font-weight: 700;
  display: flex; align-items: center; gap: 6px;
}
.support-card h4::after {
  content: "↗";
  font-size: 13px;
  color: var(--ink-300);
}
.support-card p { margin: 0; font-size: 13.5px; color: var(--ink-500); line-height: 1.5; }

/* ===== FAQ ===== */
.faq { display: flex; flex-direction: column; gap: 10px; }
.faq details {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0 18px;
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.faq details[open] {
  border-color: var(--wa-green);
  box-shadow: 0 4px 14px -6px rgba(37,211,102,.3);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 30px 18px 0;
  font-weight: 600;
  font-size: 15px;
  color: var(--ink-900);
  position: relative;
  user-select: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px; top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--ink-400);
  font-weight: 300;
  transition: transform .2s var(--ease);
}
.faq details[open] summary::after { content: "−"; color: var(--wa-green-deep); }
.faq details > div {
  padding: 0 0 18px;
  color: var(--ink-600);
  font-size: 14.5px;
  line-height: 1.7;
  border-top: 1px solid var(--ink-100);
  padding-top: 14px;
  margin-top: 0;
}
.faq details > div strong { color: var(--ink-900); font-weight: 600; }
.faq details > div ul {
  margin: 6px 0 12px;
  padding-left: 22px;
  display: flex; flex-direction: column; gap: 6px;
}
.faq details > div ul li::marker { color: var(--wa-green); }
.faq details > div em { color: var(--ink-900); font-style: normal; font-weight: 500; background: var(--ink-50); padding: 1px 6px; border-radius: 4px; }

/* ===== links ===== */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.link-col h4 {
  margin: 0 0 10px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--ink-900);
  font-weight: 700;
}
.link-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.link-col li a {
  font-size: 14px;
  color: var(--ink-600);
  display: inline-flex; align-items: center; gap: 4px;
}
.link-col li a::after { content: "↗"; font-size: 11px; opacity: .6; }
.link-col li a:hover { color: var(--meta-blue); text-decoration: none; }

.footnote {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--ink-400);
  line-height: 1.7;
}

/* ===== footer ===== */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 24px 28px;
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px;
  color: var(--ink-500);
  gap: 16px;
  flex-wrap: wrap;
}
.footer-links { display: inline-flex; gap: 16px; }

/* ===== language switching ===== */
[data-i18n-en], [data-i18n-zh] { display: none; }
html[data-lang="zh"] [data-i18n-zh] { display: revert; }
html[data-lang="en"] [data-i18n-en] { display: revert; }

/* ===== responsive ===== */
@media (max-width: 1024px) {
  .layout { grid-template-columns: 1fr; gap: 32px; padding: 40px 24px 64px; }
  .toc { position: static; max-height: none; padding: 16px; background: var(--bg-soft); border-radius: 12px; }
  .toc-list { flex-direction: row; flex-wrap: wrap; gap: 4px; }
  .toc-list a { font-size: 12.5px; padding: 6px 10px; border-left: 0; border: 1px solid var(--border); background: #fff; border-radius: 999px; }
  .toc-list a.is-active { background: var(--ink-900); color: #fff; border-color: var(--ink-900); }
}
@media (max-width: 760px) {
  .topbar-inner { padding: 12px 18px; gap: 12px; }
  .top-nav { display: none; }
  .hero { padding: 56px 20px 48px; }
  .hero-meta { grid-template-columns: 1fr; gap: 14px; }
  .role-grid, .path-grid { grid-template-columns: 1fr; }
  .brand-sub { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}