:root {

  --brand-500: #5cb3e0;
  --brand-600: #3299cd;
  --brand-700: #1d6693;
  --brand-50: #eef7fc;
  --brand-100: #d9edf8;
  --gradient-brand: linear-gradient(135deg, #5cc2f0 0%, #3299cd 55%, #1d6693 100%);

  --os-windows: #0078d4;
  --os-android: #34a853;
  --os-apple: #1f2937;
  --os-linux: #dd4814;

  --accent-blue-bg: #d9edf8;
  --accent-blue-fg: #1d6693;
  --accent-green-bg: #dcfce7;
  --accent-green-fg: #15803d;
  --accent-purple-bg: #ede9fe;
  --accent-purple-fg: #6d28d9;
  --accent-orange-bg: #ffedd5;
  --accent-orange-fg: #c2410c;
  --accent-pink-bg: #fce7f3;
  --accent-pink-fg: #be185d;
  --accent-teal-bg: #ccfbf1;
  --accent-teal-fg: #0f766e;

  --ink-900: #0f172a;
  --ink-700: #334155;
  --ink-500: #64748b;
  --ink-300: #cbd5e1;
  --ink-100: #f1f5f9;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
  --border: #e6e9ef;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 1px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 45px rgba(29, 102, 147, 0.12);
  --shadow-brand: 0 12px 28px rgba(50, 153, 205, 0.26);

  --container: 1160px;
  --header-h: 68px;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink-900);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brand-600);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  z-index: 200;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

/* ── Header ─────────────────────────────────────────────────────────── */

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header {
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink-900);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand img {
  width: 32px;
  height: 32px;
}

.brand-short {
  display: none;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-700);
  border-radius: var(--radius-full);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.main-nav a:hover,
.main-nav a:focus-visible {
  background: var(--ink-100);
  color: var(--brand-700);
}

.main-nav a.active {
  background: var(--ink-100);
  color: var(--brand-700);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-switch {
  position: relative;
}

.lang-switch-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--surface);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.lang-switch-btn:hover {
  border-color: var(--brand-500);
  color: var(--brand-700);
}

.lang-switch-btn .icon-globe {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.lang-switch-btn .icon-chevron {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.lang-switch-label {
  white-space: nowrap;
}

.lang-switch-label-short {
  display: none;
  white-space: nowrap;
  font-size: 13px;
}

.lang-switch.open .lang-switch-btn .icon {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 148px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 6px;
  display: none;
}

.lang-switch.open .lang-menu {
  display: block;
}

.lang-menu a {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--ink-700);
}

.lang-menu a:hover {
  background: var(--ink-100);
  color: var(--brand-700);
}

.lang-menu a[aria-current="true"] {
  color: var(--brand-700);
  font-weight: 600;
  background: var(--ink-100);
}

.btn-download-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  font-size: 14.5px;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-brand);
  white-space: nowrap;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn-download-nav .icon {
  width: 15px;
  height: 15px;
}

.btn-download-nav:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 32px rgba(50, 153, 205, 0.32);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
}

.nav-toggle .icon {
  width: 20px;
  height: 20px;
}

/* ── Hero ───────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  overflow: hidden;
  padding: 76px 0 64px;
  background: radial-gradient(circle at 15% 15%, var(--brand-50) 0%, transparent 55%),
    radial-gradient(circle at 85% 0%, #eff6ff 0%, transparent 50%), var(--surface);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: center;
  gap: 48px;
}

.hero-copy {
  min-width: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-700);
  background: var(--brand-100);
  border-radius: var(--radius-full);
  margin-bottom: 18px;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.2;
  font-weight: 800;
  margin: 0 0 18px;
  letter-spacing: -0.5px;
}

.hero h1 .grad {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  font-size: 17px;
  color: var(--ink-500);
  margin: 0 0 30px;
  max-width: 560px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  font-size: 15.5px;
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  cursor: pointer;
  border: none;
}

.btn .icon {
  width: 17px;
  height: 17px;
}

.btn-primary {
  color: #fff;
  background: var(--ink-900);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.22);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: #1e293b;
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.28);
}

.btn-secondary {
  color: var(--ink-900);
  background: var(--surface);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--brand-500);
  color: var(--brand-700);
}

.hero-platforms {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.hero-platforms-label {
  font-size: 13px;
  color: var(--ink-500);
}

.hero-platform-icons {
  display: flex;
  gap: 14px;
}

.hero-platform-icons .icon-chip {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.hero-platform-icons .icon {
  width: 18px;
  height: 18px;
}

.icon-windows { color: var(--os-windows); }
.icon-android { color: var(--os-android); }
.icon-apple { color: var(--os-apple); }
.icon-linux { color: var(--os-linux); }

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
}

.hero-visual .blob {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 42% 58% 55% 45% / 50% 45% 55% 50%;
  background: var(--gradient-brand);
  opacity: 0.13;
  filter: blur(4px);
  animation: floaty 8s ease-in-out infinite;
}

@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(4deg); }
}

.app-mock {
  position: relative;
  width: 100%;
  max-width: 320px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.app-mock-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-muted);
}

.app-mock-bar .win-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}

.win-dot.red { background: #f87171; }
.win-dot.yellow { background: #fbbf24; }
.win-dot.green { background: #34d399; }

.app-mock-title {
  margin-left: 6px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-500);
  white-space: nowrap;
}

.app-mock-body {
  padding: 28px 24px 26px;
  text-align: center;
}

.app-mock-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  filter: drop-shadow(0 10px 18px rgba(50, 153, 205, 0.22));
}

.app-mock-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: var(--radius-full);
  background: #ecfdf5;
  color: #059669;
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  margin-bottom: 14px;
}

.app-mock-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.18);
  flex-shrink: 0;
}

.app-mock-node {
  font-size: 13.5px;
  color: var(--ink-500);
  margin-bottom: 20px;
  white-space: nowrap;
}

.app-mock-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.app-mock-meta div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.app-mock-meta span {
  font-size: 12px;
  color: var(--ink-500);
}

.app-mock-meta strong {
  font-size: 15px;
  color: var(--ink-900);
}

.app-mock-caption {
  padding: 9px 16px;
  border-top: 1px solid var(--border);
  background: var(--surface-muted);
  font-size: 11.5px;
  color: var(--ink-500);
  text-align: center;
}

section {
  padding: 72px 0;
}

.section-muted {
  background: var(--surface-muted);
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 44px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brand-600);
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  margin: 0 0 12px;
  letter-spacing: -0.3px;
}

.section-head p {
  color: var(--ink-500);
  font-size: 16px;
  margin: 0;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  align-items: start;
}

.intro-copy h2 {
  font-size: 30px;
  font-weight: 800;
  margin: 0 0 18px;
  letter-spacing: -0.3px;
}

.intro-copy h3 {
  font-size: 19px;
  font-weight: 700;
  margin: 28px 0 12px;
}

.intro-copy p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-700);
  margin: 0 0 16px;
}

.intro-copy strong {
  color: var(--ink-900);
}

.intro-card {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
}

.intro-card h3 {
  font-size: 16px;
  margin: 0 0 16px;
}

.intro-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-700);
  margin-bottom: 14px;
  line-height: 1.6;
}

.intro-list li:last-child {
  margin-bottom: 0;
}

.intro-list .icon {
  flex-shrink: 0;
  margin-top: 2px;
  width: 16px;
  height: 16px;
  color: #fff;
  background: var(--brand-600);
  border-radius: 50%;
  padding: 3px;
  box-sizing: content-box;
}

.intro-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  width: 100%;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-700);
}

.intro-card-link .icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition);
}

.intro-card-link:hover .icon {
  transform: translateX(3px);
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.platform-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--brand-100);
}

.platform-card .platform-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: var(--radius-md);
  background: var(--ink-100);
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-card .platform-icon .icon {
  width: 26px;
  height: 26px;
  color: var(--brand-600);
}

.platform-card .platform-icon.tone-windows { background: var(--accent-blue-bg); }
.platform-card .platform-icon.tone-windows .icon { color: var(--os-windows); }
.platform-card .platform-icon.tone-apple { background: var(--ink-100); }
.platform-card .platform-icon.tone-apple .icon { color: var(--os-apple); }
.platform-card .platform-icon.tone-linux { background: var(--accent-orange-bg); }
.platform-card .platform-icon.tone-linux .icon { color: var(--os-linux); }
.platform-card .platform-icon.tone-android { background: var(--accent-green-bg); }
.platform-card .platform-icon.tone-android .icon { color: var(--os-android); }

.platform-card h3 {
  font-size: 16px;
  margin: 0 0 4px;
}

.platform-card .client-name {
  font-size: 13px;
  color: var(--ink-500);
  margin: 0 0 14px;
}

.platform-card .btn-mini {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand-700);
}

.platform-card .btn-mini .icon {
  width: 15px;
  height: 15px;
  transition: transform var(--transition);
}

.platform-card:hover .btn-mini .icon {
  transform: translateX(3px);
}

.compare-table-wrap {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  font-size: 14.5px;
}

.compare-table th,
.compare-table td {
  text-align: left;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.compare-table td:last-child,
.compare-table th:last-child {
  white-space: normal;
  min-width: 220px;
}

.compare-table thead th {
  background: var(--ink-100);
  color: var(--ink-900);
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.compare-table tbody th {
  font-weight: 700;
  color: var(--ink-900);
}

.compare-table tbody td {
  color: var(--ink-700);
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-note {
  margin: 20px 2px 0;
  font-size: 14px;
  color: var(--ink-500);
  line-height: 1.7;
}

.compare-note strong {
  color: var(--ink-900);
}

.intro-more-links a,
.compare-note a {
  color: var(--brand-700);
  text-decoration: underline;
  text-decoration-color: var(--brand-100);
  text-underline-offset: 2px;
}

.intro-more-links a:hover,
.compare-note a:hover {
  text-decoration-color: var(--brand-500);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.trust-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.trust-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.trust-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background: var(--ink-100);
  color: var(--brand-600);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.trust-icon .icon {
  width: 22px;
  height: 22px;
}

.trust-icon.tone-blue { background: var(--accent-blue-bg); color: var(--accent-blue-fg); }
.trust-icon.tone-green { background: var(--accent-green-bg); color: var(--accent-green-fg); }
.trust-icon.tone-purple { background: var(--accent-purple-bg); color: var(--accent-purple-fg); }
.trust-icon.tone-orange { background: var(--accent-orange-bg); color: var(--accent-orange-fg); }

.trust-card h3 {
  font-size: 16px;
  margin: 0 0 8px;
}

.trust-card p {
  font-size: 13.5px;
  color: var(--ink-500);
  margin: 0;
  line-height: 1.6;
}

.install-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.tabs-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 20px 24px;
  background: var(--surface-muted);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tabs-nav button {
  flex: 0 0 auto;
  padding: 11px 22px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink-500);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.tabs-nav button .icon {
  width: 17px;
  height: 17px;
}

.tabs-nav button:hover {
  color: var(--brand-700);
  border-color: var(--brand-500);
}

.tabs-nav button.active {
  color: #fff;
  background: var(--brand-600);
  border-color: var(--brand-600);
  box-shadow: var(--shadow-sm);
}

.tab-panel {
  display: none;
  padding: 32px;
}

.tab-panel.active {
  display: block;
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  counter-reset: install;
}

.install-steps li {
  list-style: none;
  position: relative;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 18px;
}

.install-steps li::before {
  counter-increment: install;
  content: counter(install);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--brand-600);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.install-steps li:nth-child(2)::before {
  background: var(--accent-teal-fg);
}

.install-steps li:nth-child(3)::before {
  background: var(--accent-purple-fg);
}

.install-steps li strong {
  display: block;
  font-size: 15px;
  margin-bottom: 6px;
}

.install-steps li span {
  font-size: 13.5px;
  color: var(--ink-500);
  line-height: 1.6;
}

.install-panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.install-panel-footer .btn {
  margin: 0;
}

.install-panel-hint {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--ink-500);
}

.install-panel-hint a {
  color: var(--brand-700);
  font-weight: 600;
  text-decoration: none;
}

.install-panel-hint a:hover {
  text-decoration: underline;
}

.quickstart-flow {
  display: flex;
  align-items: flex-start;
  gap: 4px;
}

.quickstart-step {
  flex: 1;
  min-width: 0;
}

.quickstart-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--brand-600);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.quickstart-step:nth-child(3) .quickstart-num {
  background: var(--accent-teal-fg);
}

.quickstart-step:nth-child(5) .quickstart-num {
  background: var(--accent-purple-fg);
}

.quickstart-step h3 {
  font-size: 16.5px;
  margin-bottom: 8px;
}

.quickstart-step p {
  font-size: 13.5px;
  color: var(--ink-500);
  line-height: 1.7;
}

.quickstart-arrow {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 6px;
  color: var(--border-strong, var(--border));
}

.quickstart-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.quickstart-footer .btn {
  margin: 0;
}

.quickstart-clients {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.quickstart-clients-label {
  font-size: 13px;
  color: var(--ink-400, var(--ink-500));
}

.quickstart-client {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-700, var(--ink-900));
}

.quickstart-client img {
  border-radius: 6px;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.faq-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.faq-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.faq-card h3 {
  font-size: 16px;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-icon {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--ink-100);
  color: var(--brand-600);
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-icon.tone-blue { background: var(--accent-blue-bg); color: var(--accent-blue-fg); }
.faq-icon.tone-green { background: var(--accent-green-bg); color: var(--accent-green-fg); }
.faq-icon.tone-purple { background: var(--accent-purple-bg); color: var(--accent-purple-fg); }
.faq-icon.tone-orange { background: var(--accent-orange-bg); color: var(--accent-orange-fg); }
.faq-icon.tone-pink { background: var(--accent-pink-bg); color: var(--accent-pink-fg); }
.faq-icon.tone-teal { background: var(--accent-teal-bg); color: var(--accent-teal-fg); }

.faq-icon .icon {
  width: 19px;
  height: 19px;
}

.faq-card p {
  font-size: 13.5px;
  color: var(--ink-500);
  margin: 0;
}

.faq-more {
  text-align: center;
  margin-top: 28px;
}

.faq-more a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--brand-700);
  font-size: 14.5px;
}

.faq-more .icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition);
}

.faq-more a:hover .icon {
  transform: translateX(3px);
}

.page-hero {
  background: linear-gradient(180deg, var(--brand-50), var(--surface));
  border-bottom: 1px solid var(--border);
  padding: 36px 0 34px;
}

.page-hero h1 {
  font-size: 32px;
  font-weight: 800;
  margin: 0 0 10px;
  letter-spacing: -0.3px;
}

.page-hero p {
  color: var(--ink-500);
  font-size: 15.5px;
  margin: 0;
  max-width: 640px;
}

.faq-quicknav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.faq-quicknav a {
  padding: 9px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-700);
  transition: border-color var(--transition), color var(--transition), box-shadow var(--transition);
}

.faq-quicknav a:hover {
  border-color: var(--brand-500);
  color: var(--brand-600);
  box-shadow: var(--shadow-sm);
}

.faq-page-grid {
  max-width: 820px;
}

.faq-category {
  margin-bottom: 48px;
}

.faq-category:last-child {
  margin-bottom: 0;
}

.faq-category-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.faq-category-icon.tone-blue { background: var(--accent-blue-bg); color: var(--accent-blue-fg); }
.faq-category-icon.tone-green { background: var(--accent-green-bg); color: var(--accent-green-fg); }
.faq-category-icon.tone-purple { background: var(--accent-purple-bg); color: var(--accent-purple-fg); }
.faq-category-icon.tone-orange { background: var(--accent-orange-bg); color: var(--accent-orange-fg); }

.faq-category-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--ink-100);
  color: var(--brand-600);
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-category-head h2 {
  font-size: 21px;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.2px;
}

.faq-list {
  border-top: 1px solid var(--border);
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 2px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15.5px;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary .chevron {
  color: var(--ink-500);
  transition: transform var(--transition);
}

.faq-item[open] summary .chevron {
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 2px 20px;
  color: var(--ink-700);
  font-size: 14.5px;
  line-height: 1.85;
}

.faq-item .faq-answer p {
  margin: 0;
}

.faq-item .faq-answer a {
  color: var(--brand-700);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.platform-section {
  margin-bottom: 34px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.platform-section:last-child {
  margin-bottom: 0;
}

.platform-section-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.platform-section-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--ink-900);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-section-icon .icon {
  width: 16px;
  height: 16px;
}

.platform-section-icon.tone-windows { background: var(--os-windows); }
.platform-section-icon.tone-apple { background: var(--os-apple); }
.platform-section-icon.tone-linux { background: var(--os-linux); }
.platform-section-icon.tone-android { background: var(--os-android); }

.platform-section-head h2 {
  font-size: 17px;
  font-weight: 800;
  margin: 0;
}

.platform-section-head p {
  color: var(--ink-500);
  font-size: 13px;
  margin: 1px 0 0;
}

.download-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.download-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.download-row:last-of-type {
  border-bottom: none;
}

.download-row-main {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1 1 220px;
  min-width: 0;
}

.download-row-icon {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-row-icon img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.download-row-body {
  min-width: 0;
}

.download-row-title {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink-900);
}

.download-row-tag {
  font-size: 12.5px;
  color: var(--ink-500);
  margin-top: 1px;
}

.badge-recommend {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--brand-700);
  background: var(--brand-100);
  border-radius: var(--radius-full);
  padding: 2px 9px;
}

.download-row-meta {
  display: flex;
  gap: 16px;
  font-size: 12.5px;
  color: var(--ink-500);
  white-space: nowrap;
  flex-shrink: 0;
}

.download-row-meta strong {
  color: var(--ink-900);
  font-weight: 600;
}

.download-row-action {
  flex-shrink: 0;
  margin-left: auto;
}

.btn-sm {
  padding: 9px 20px;
  font-size: 13.5px;
}

.download-note {
  display: flex;
  gap: 8px;
  padding: 12px 20px;
  font-size: 13px;
  color: var(--ink-500);
  background: var(--surface-muted);
  border-top: 1px solid var(--border);
  line-height: 1.65;
}

.download-note-standalone {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-top: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.download-note .icon {
  flex-shrink: 0;
  width: 15px;
  height: 15px;
  color: var(--brand-600);
  margin-top: 2px;
}

.download-note strong {
  color: var(--ink-900);
}

.breadcrumb {
  padding: 13px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.breadcrumb .container {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--ink-500);
}

.breadcrumb a {
  color: var(--ink-500);
}

.breadcrumb a:hover {
  color: var(--brand-700);
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--ink-300);
}

.breadcrumb-current {
  color: var(--ink-900);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 420px;
}

.article-download-cta {
  max-width: 760px;
  margin: 32px auto 0;
  display: flex;
  align-items: center;
  gap: 20px;
  background: linear-gradient(135deg, var(--brand-600), var(--brand-700));
  border-radius: var(--radius-lg);
  padding: 26px 30px;
  color: #fff;
}

.article-download-cta-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-download-cta-icon .icon {
  width: 26px;
  height: 26px;
}

.article-download-cta-copy {
  flex: 1;
}

.article-download-cta-copy strong {
  display: block;
  font-size: 17px;
  margin-bottom: 4px;
}

.article-download-cta-copy p {
  margin: 0;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.6;
}

.article-download-cta-copy p a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-download-cta .btn {
  flex-shrink: 0;
  background: #fff;
  color: var(--brand-700);
  white-space: nowrap;
}

.article-download-cta .btn:hover {
  background: rgba(255, 255, 255, 0.9);
}

.floating-download {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 280px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 14px 16px 14px 14px;
}

.floating-download-icon {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--brand-50);
  color: var(--brand-700);
  display: flex;
  align-items: center;
  justify-content: center;
}

.floating-download-icon .icon {
  width: 19px;
  height: 19px;
}

.floating-download-copy {
  flex: 1;
  min-width: 0;
}

.floating-download-copy strong {
  display: block;
  font-size: 13px;
  color: var(--ink-900);
  margin-bottom: 2px;
}

.floating-download-copy a {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--brand-700);
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.floating-download-close {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: var(--ink-100);
  color: var(--ink-500);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.floating-download-close .icon {
  width: 13px;
  height: 13px;
}

.floating-download-close:hover {
  background: var(--ink-300);
  color: var(--ink-900);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.blog-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 26px 28px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.blog-card:hover {
  border-color: var(--brand-500);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.blog-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.blog-card-icon.tone-blue { background: var(--accent-blue-bg); color: var(--accent-blue-fg); }
.blog-card-icon.tone-green { background: var(--accent-green-bg); color: var(--accent-green-fg); }
.blog-card-icon.tone-purple { background: var(--accent-purple-bg); color: var(--accent-purple-fg); }
.blog-card-icon.tone-orange { background: var(--accent-orange-bg); color: var(--accent-orange-fg); }
.blog-card-icon.tone-pink { background: var(--accent-pink-bg); color: var(--accent-pink-fg); }
.blog-card-icon.tone-teal { background: var(--accent-teal-bg); color: var(--accent-teal-fg); }

.article-tag.tone-blue { background: var(--accent-blue-bg); color: var(--accent-blue-fg); }
.article-tag.tone-green { background: var(--accent-green-bg); color: var(--accent-green-fg); }
.article-tag.tone-purple { background: var(--accent-purple-bg); color: var(--accent-purple-fg); }
.article-tag.tone-orange { background: var(--accent-orange-bg); color: var(--accent-orange-fg); }
.article-tag.tone-pink { background: var(--accent-pink-bg); color: var(--accent-pink-fg); }
.article-tag.tone-teal { background: var(--accent-teal-bg); color: var(--accent-teal-fg); }

.blog-card-icon .icon {
  width: 21px;
  height: 21px;
}

.blog-card h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-900);
  margin: 0;
  line-height: 1.4;
}

.blog-card p {
  font-size: 13.5px;
  color: var(--ink-700);
  line-height: 1.65;
  margin: 0;
  flex: 1;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--ink-500);
}

.blog-card-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--ink-300);
}

.article-hero {
  background: linear-gradient(180deg, var(--brand-50), var(--surface));
  border-bottom: 1px solid var(--border);
  padding: 36px 0 30px;
}

.article-hero .container {
  max-width: 760px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.article-tag {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  padding: 4px 12px;
}

.article-meta-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-500);
}

.article-meta-info .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--ink-300);
}

.article-hero h1 {
  font-size: 30px;
  font-weight: 800;
  margin: 0 0 10px;
  letter-spacing: -0.3px;
}

.article-hero .lead {
  color: var(--ink-500);
  font-size: 15.5px;
  line-height: 1.7;
  margin: 0;
}

.article-body-section {
  padding: 40px 0 8px;
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-700);
}

.article-body h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--ink-900);
  margin: 42px 0 14px;
  letter-spacing: -0.2px;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-900);
  margin: 26px 0 10px;
}

.article-body p {
  margin: 0 0 16px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 18px;
  padding-left: 22px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.article-body li {
  line-height: 1.75;
}

.article-body strong {
  color: var(--ink-900);
  font-weight: 700;
}

.article-body code {
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  font-size: 0.9em;
  background: var(--ink-100);
  color: var(--ink-900);
  padding: 2px 6px;
  border-radius: 4px;
}

.article-body a {
  color: var(--brand-700);
  text-decoration: underline;
  text-decoration-color: var(--brand-100);
  text-underline-offset: 2px;
}

.article-body a:hover {
  text-decoration-color: var(--brand-500);
}

.article-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin: 0 0 20px;
}

.article-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13.5px;
}

.article-table th,
.article-table td {
  padding: 11px 15px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.article-table th {
  background: var(--ink-100);
  font-weight: 700;
  color: var(--ink-900);
}

.article-table tbody tr:last-child td {
  border-bottom: none;
}

.article-divider {
  max-width: 760px;
  margin: 36px auto;
  height: 1px;
  background: var(--border);
}

.article-cta {
  max-width: 760px;
  margin: 8px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
}

.article-cta p {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-700);
}

.article-cta p strong {
  display: block;
  font-size: 15.5px;
  color: var(--ink-900);
  margin-bottom: 3px;
}

.article-back {
  max-width: 760px;
  margin: 36px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.article-back a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 14px;
  color: var(--brand-700);
}

.article-back a .icon {
  width: 16px;
  height: 16px;
}

.tutorial-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 30px 32px;
}

.tutorial-steps {
  list-style: none;
  counter-reset: tutorial-step;
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin: 0;
  padding: 0;
}

.tutorial-steps > li {
  position: relative;
  padding-left: 46px;
}

.tutorial-steps > li::before {
  counter-increment: tutorial-step;
  content: counter(tutorial-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--ink-900);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tutorial-steps > li h3 {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink-900);
  margin: 0 0 5px;
}

.tutorial-steps > li p {
  font-size: 14px;
  color: var(--ink-700);
  line-height: 1.7;
  margin: 0;
}

.tutorial-steps > li p + p {
  margin-top: 6px;
}

.tutorial-tip {
  display: flex;
  gap: 9px;
  margin-top: 10px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-700);
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  line-height: 1.65;
}

.tutorial-tip a {
  color: var(--brand-700);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.tutorial-tip.tip-warning {
  background: var(--accent-orange-bg);
  border-color: transparent;
  color: var(--accent-orange-fg);
}

.tutorial-tip svg {
  flex-shrink: 0;
  width: 15px;
  height: 15px;
  margin-top: 2px;
}

.tutorial-tip strong {
  color: var(--ink-900);
}

.tutorial-tip.tip-warning strong {
  color: var(--accent-orange-fg);
}

.tutorial-card-divider {
  height: 1px;
  background: var(--border);
  margin: 26px 0;
}

.tutorial-tip-standalone {
  margin-top: 28px;
}

.tutorial-figure {
  margin: 22px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.tutorial-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.tutorial-figure figcaption {
  padding: 12px 18px;
  font-size: 13px;
  color: var(--ink-500);
  background: var(--surface-muted);
  border-top: 1px solid var(--border);
  text-align: center;
}

.tutorial-hero-figure {
  margin-top: 28px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.tutorial-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.troubleshoot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.troubleshoot-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 22px 24px;
}

.troubleshoot-card a {
  color: var(--brand-700);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.troubleshoot-card .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink-900);
  color: #fff;
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 12px;
}

.troubleshoot-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
  margin: 0 0 6px;
}

.troubleshoot-card p {
  font-size: 13.5px;
  color: var(--ink-700);
  line-height: 1.65;
  margin: 0;
}

.page-hero-tutorial {
  padding: 40px 0 0;
  overflow: hidden;
}

.page-hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 40px;
}

.page-hero-figure {
  align-self: end;
  margin-bottom: -1px;
}

.page-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-lg);
}

.modes-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 36px;
  align-items: center;
}

.modes-figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.modes-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.modes-figure figcaption {
  padding: 12px 16px;
  font-size: 12.5px;
  color: var(--ink-500);
  background: var(--surface-muted);
  border-top: 1px solid var(--border);
  line-height: 1.6;
}

.modes-legend {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.modes-legend-item {
  padding-left: 18px;
  border-left: 3px solid var(--ink-300);
}

.modes-legend-item.dot-green { border-left-color: #22c55e; }
.modes-legend-item.dot-blue { border-left-color: var(--brand-600); }
.modes-legend-item.dot-orange { border-left-color: #f97316; }
.modes-legend-item.dot-gray { border-left-color: var(--ink-300); }

.modes-legend-item h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
  margin: 0 0 5px;
}

.modes-legend-item p {
  font-size: 13.5px;
  color: var(--ink-700);
  line-height: 1.65;
  margin: 0;
}

.section-head-split {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 28px;
  margin-bottom: 32px;
  text-align: left;
}

.section-head-split .section-head-main {
  max-width: 460px;
}

.section-head-split h2 {
  font-size: 28px;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.3px;
}

.section-head-split p {
  max-width: 400px;
  color: var(--ink-500);
  font-size: 14.5px;
  margin: 0;
}

.trust-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.tabs-bare .tabs-nav {
  border-bottom: none;
  justify-content: center;
  gap: 10px;
  margin-bottom: 22px;
}

.tabs-bare .tabs-nav button {
  flex: none;
  min-width: auto;
  padding: 9px 20px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.tabs-bare .tabs-nav button img {
  width: 16px;
  height: 16px;
  border-radius: 3px;
}

.tabs-bare .tabs-nav button:hover {
  border-color: var(--brand-600);
}

.tabs-bare .tabs-nav button.active {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: #fff;
}

.tabs-bare .tab-panel {
  padding: 0;
}

.changelog-list {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.changelog-item {
  padding: 22px 26px;
  border-bottom: 1px solid var(--border);
}

.changelog-item:last-child {
  border-bottom: none;
}

.changelog-version {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 15.5px;
  font-weight: 800;
  color: var(--ink-900);
  margin-bottom: 12px;
}

.changelog-date {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-500);
}

.changelog-badge {
  font-size: 11px;
  font-weight: 700;
  border-radius: var(--radius-full);
  padding: 2px 9px;
}

.changelog-badge-danger {
  color: #b91c1c;
  background: #fee2e2;
}

.changelog-item ul {
  display: flex;
  flex-direction: column;
  gap: 7px;
  max-width: 780px;
}

.changelog-item li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  color: var(--ink-700);
  line-height: 1.65;
}

.changelog-item li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand-600);
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.resource-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.resource-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.resource-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--ink-100);
  color: var(--brand-600);
  display: flex;
  align-items: center;
  justify-content: center;
}

.resource-icon .icon {
  width: 19px;
  height: 19px;
}

.resource-icon.tone-blue { background: var(--accent-blue-bg); color: var(--accent-blue-fg); }
.resource-icon.tone-green { background: var(--accent-green-bg); color: var(--accent-green-fg); }
.resource-icon.tone-purple { background: var(--accent-purple-bg); color: var(--accent-purple-fg); }
.resource-icon.tone-orange { background: var(--accent-orange-bg); color: var(--accent-orange-fg); }

.resource-card h3 {
  font-size: 15px;
  margin: 0 0 4px;
  color: var(--ink-900);
}

.resource-card p {
  font-size: 13px;
  color: var(--ink-500);
  margin: 0;
  line-height: 1.6;
}

.empty-state {
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 24px;
}

.empty-state-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: var(--radius-full);
  background: var(--ink-100);
  color: var(--brand-600);
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-state-icon .icon {
  width: 26px;
  height: 26px;
}

.empty-state h2 {
  font-size: 22px;
  font-weight: 800;
  margin: 0 0 10px;
}

.empty-state p {
  color: var(--ink-500);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 24px;
}

.cta-band {
  background: var(--gradient-brand);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: #fff;
}

.cta-band h2 {
  font-size: 26px;
  margin: 0 0 8px;
}

.cta-band p {
  margin: 0;
  opacity: 0.92;
  font-size: 15px;
}

.cta-band .btn-primary {
  background: #fff;
  color: var(--brand-700);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.14);
}

.cta-band .btn-primary:hover {
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.18);
}

/* ── Footer ─────────────────────────────────────────────────────────── */

.site-footer {
  background: var(--ink-900);
  color: var(--ink-300);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  margin-bottom: 12px;
  text-decoration: none;
  transition: opacity var(--transition);
}

.footer-brand:hover {
  opacity: 0.85;
}

.footer-brand img {
  width: 28px;
  height: 28px;
}

.footer-grid p {
  font-size: 13.5px;
  color: #94a3b8;
  max-width: 280px;
  margin: 0;
}

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  margin: 0 0 14px;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 13.5px;
  color: #94a3b8;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 22px;
  font-size: 12.5px;
  color: #64748b;
}

.footer-disclaimer {
  font-size: 12px;
  color: #556170;
  max-width: 760px;
  margin: 14px 0 0;
  line-height: 1.7;
}

.dl-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  max-width: 260px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 14px 16px;
  display: none;
}

@media (max-width: 1020px) {
  .main-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .brand-full {
    display: none;
  }

  .brand-short {
    display: inline;
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    max-width: 320px;
    min-height: 0;
    margin: 8px auto 0;
  }

  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .faq-grid {
    grid-template-columns: 1fr;
  }

  .intro-grid {
    grid-template-columns: 1fr;
  }

  .intro-card {
    position: static;
  }

  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid > div:first-child {
    grid-column: 1 / -1;
  }

  .page-hero-split {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-hero-figure {
    order: -1;
    max-width: 460px;
    margin: 0 auto;
  }

  .page-hero-figure img {
    border-radius: var(--radius-lg);
  }

  .modes-layout {
    grid-template-columns: 1fr;
  }

  .section-head-split {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-head-split .section-head-main,
  .section-head-split p {
    max-width: none;
  }
}

@media (max-width: 720px) {

  .btn {
    white-space: normal;
    text-align: center;
  }

  .tabs-bare .tabs-nav {
    justify-content: flex-start;
    padding-bottom: 2px;
  }

  .tutorial-card {
    padding: 22px 18px;
  }

  .tutorial-steps > li {
    padding-left: 40px;
  }

  .troubleshoot-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero p.lead {
    font-size: 15.5px;
  }

  section {
    padding: 52px 0;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .page-hero {
    padding: 28px 0 26px;
  }

  .page-hero h1 {
    font-size: 26px;
  }

  .article-hero h1 {
    font-size: 24px;
  }

  .article-body h2 {
    font-size: 19px;
    margin-top: 32px;
  }

  .article-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-download-cta {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  .article-download-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .breadcrumb-current {
    max-width: 220px;
  }

  .floating-download {
    left: 14px;
    right: 14px;
    bottom: 14px;
    max-width: none;
  }

  .faq-category-head h2 {
    font-size: 18px;
  }

  .download-row {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .download-row-main {
    flex: none;
  }

  .download-row-meta {
    flex-wrap: wrap;
  }

  .download-row-action {
    margin-left: 0;
  }

  .download-row-action .btn {
    width: 100%;
    justify-content: center;
  }

  .faq-item summary {
    font-size: 14.5px;
  }

  .install-steps {
    grid-template-columns: 1fr;
  }

  .tab-panel {
    padding: 22px 18px;
  }

  .tabs-nav {
    justify-content: flex-start;
    padding: 16px;
  }

  .install-panel-footer {
    justify-content: flex-start;
  }

  .quickstart-flow {
    flex-direction: column;
    gap: 20px;
  }

  .quickstart-arrow {
    display: none;
  }

  .quickstart-footer {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
  }

  .quickstart-footer .btn {
    width: 100%;
  }

  .intro-copy h2 {
    font-size: 24px;
  }

  .intro-copy h3 {
    font-size: 17px;
  }

  .trust-grid {
    grid-template-columns: 1fr;
  }

  .trust-grid-3 {
    grid-template-columns: 1fr;
  }

  .resource-grid {
    grid-template-columns: 1fr;
  }

  .compare-table {
    min-width: 560px;
  }

  .cta-band {
    flex-direction: column;
    text-align: center;
    padding: 36px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .hero-ctas .btn {
    width: 100%;
  }

  .hero-platforms {
    justify-content: center;
  }

  .lang-switch-label,
  .lang-switch-btn .icon-globe {
    display: none;
  }

  .lang-switch-label-short {
    display: inline;
  }

  .lang-switch-btn {
    padding: 8px 10px;
  }

  .header-actions {
    gap: 6px;
  }

  .header-actions .btn-download-nav {
    display: none;
  }

  .nav-toggle {
    width: 36px;
    height: 36px;
  }
}

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(15, 23, 42, 0.44);
  display: none;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(320px, 84%);
  height: 100%;
  background: var(--surface);
  box-shadow: -20px 0 40px rgba(15, 23, 42, 0.2);
  padding: 20px;
  overflow-y: auto;
}

.mobile-nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.mobile-nav-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.mobile-nav-close .icon {
  width: 18px;
  height: 18px;
}

.mobile-nav-list a {
  display: flex;
  align-items: center;
  padding: 13px 10px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink-900);
  border-radius: var(--radius-sm);
  width: 100%;
}

.mobile-nav-list a:hover,
.mobile-nav-list a.active {
  background: var(--ink-100);
  color: var(--brand-700);
}

.mobile-nav-list .btn-download-nav {
  margin-top: 12px;
  width: 100%;
  justify-content: center;
}