:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f8;
  --surface: #ffffff;
  --surface-2: #f2f2f4;
  --text: #0c0c0c;
  --text-secondary: #6e6e73;
  --text-tertiary: #a1a1a6;
  --border: rgba(0, 0, 0, 0.06);
  --border-strong: rgba(0, 0, 0, 0.1);
  --accent: #0c0c0c;
  --accent-hover: #2c2c2e;
  --accent-soft: rgba(0, 0, 0, 0.04);
  --radius: 24px;
  --radius-sm: 14px;
  --max-w: 1180px;
  --header-h: 76px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 40px 100px rgba(0, 0, 0, 0.12);
  --font: 'Inter', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
}

:root[data-theme="dark"] {
  --bg: #0a0a0c;
  --bg-soft: #111114;
  --surface: #141418;
  --surface-2: #1c1c20;
  --text: rgba(255, 255, 255, 0.94);
  --text-secondary: rgba(255, 255, 255, 0.62);
  --text-tertiary: rgba(255, 255, 255, 0.38);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --accent: #ffffff;
  --accent-hover: #e8e8ec;
  --accent-soft: rgba(255, 255, 255, 0.08);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.24);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.36);
  --shadow-xl: 0 40px 100px rgba(0, 0, 0, 0.48);
}

:root[data-theme="dark"] img {
  filter: brightness(0.96);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

html::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

html::-webkit-scrollbar-track {
  background: transparent;
}

html::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.18);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}

html::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.32);
  border: 2px solid transparent;
  background-clip: content-box;
}

html {
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 0, 0, 0.18) transparent;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(0, 0, 0, 0.08); }

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; }

.mono { font-family: var(--font-mono); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--border);
}

.header-inner {
  max-width: var(--max-w);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand-logo {
  height: 28px;
  width: auto;
  display: block;
}

.brand-logo--dark { display: none; }

:root[data-theme="dark"] .brand-logo--light { display: none; }
:root[data-theme="dark"] .brand-logo--dark { display: block; }

.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

@media (max-width: 1080px) {
  .header-nav {
    gap: 0;
  }
}

.header-nav a {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.25s ease;
}

.header-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 0;
  height: 1.5px;
  background: var(--text);
  border-radius: 1px;
  transition: width 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.header-nav a:hover {
  color: var(--text);
}

.header-nav a:hover::after {
  width: 100%;
}

.header-nav a[aria-current="page"] {
  color: var(--text);
}

.header-nav a[aria-current="page"]::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.25s, opacity 0.25s;
}

body.nav-open .menu-toggle span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
body.nav-open .menu-toggle span:nth-child(2) { opacity: 0; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-left: 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
}

.theme-toggle:hover {
  color: var(--text);
  background: var(--accent-soft);
  border-color: var(--border-strong);
  transform: rotate(12deg);
}

.theme-icon {
  width: 20px;
  height: 20px;
}

.theme-icon--moon { display: none; }

:root[data-theme="dark"] .theme-icon--sun { display: none; }
:root[data-theme="dark"] .theme-icon--moon { display: block; }

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: var(--accent-hover);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.16);
}

.btn-primary svg { width: 16px; height: 16px; }

.btn-primary--large {
  padding: 18px 40px;
  font-size: 15px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: var(--accent-soft);
  border-color: var(--text-secondary);
}

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.btn-text:hover {
  opacity: 0.6;
  transform: translateX(3px);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--header-h) + 60px) 24px 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 70%;
  background: radial-gradient(ellipse 80% 60% at 70% 20%, rgba(0, 0, 0, 0.03), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
  gap: 64px;
  align-items: center;
  flex: 1;
}

.hero-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 26px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(48px, 6.5vw, 84px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 26px;
}

.hero-title span {
  display: block;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--text-secondary);
}

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 24em;
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
}

.hero-visual {
  position: relative;
  height: 540px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-screenshot {
  display: block;
  border-radius: 0;
  background: transparent;
  border: none;
}

.hero-screenshot--desktop {
  width: 720px;
  height: auto;
  max-width: none;
}

.hero-screenshot--phone {
  position: absolute;
  width: 170px;
  height: auto;
  bottom: -10px;
  right: -20px;
  border-radius: 0;
}

.hero-bottom {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 60px auto 0;
  width: 100%;
  display: flex;
  gap: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hero-stat-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.hero-stat-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

/* ---------- Section common ---------- */
.section { padding: 160px 24px; position: relative; }
.section:nth-child(even) { background: var(--bg-soft); }
.section-inner { max-width: var(--max-w); margin: 0 auto; }

.section-header {
  max-width: 560px;
  margin-bottom: 80px;
}

.section-header--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 18px;
}

.section-lead {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- Platforms ---------- */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.platform-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.platform-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.platform-card--soon {
  background: linear-gradient(180deg, #fff 0%, #fafafa 100%);
}

.platform-card-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.platform-card-tag {
  display: inline-flex;
  width: fit-content;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  background: #f2f2f4;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.platform-card-tag--soon {
  background: #fff7ed;
  color: #9a3412;
}

.platform-card-body h3 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.platform-card-body p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex: 1;
}

.platform-card-specs {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.platform-card-specs li {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  white-space: nowrap;
}

.platform-card--soon .platform-card-specs li {
  background: #fff;
  color: var(--text-secondary);
}

.platform-card-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
}

.platform-card-link {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.platform-card-link:hover {
  transform: translateX(4px);
  opacity: 0.6;
}

.platform-card-link--muted {
  color: var(--text-secondary);
}

/* ---------- Features ---------- */
.features { background: var(--bg) !important; }

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

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-num {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- Changelog ---------- */
.changelog { background: var(--bg-soft) !important; }

.changelog-wrap {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 64px;
}

.changelog-col-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-strong);
}

.changelog-col-head h3 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.changelog-col-head a {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.changelog-col-head a:hover {
  color: var(--text);
}

.changelog-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.changelog-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.changelog-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.changelog-item-version {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.changelog-item-meta {
  font-size: 12px;
  color: var(--text-tertiary);
}

.changelog-item-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.changelog-empty {
  font-size: 14px;
  color: var(--text-tertiary);
}

/* ---------- CTA ---------- */
.cta { background: var(--bg) !important; }

.cta-card {
  text-align: center;
  padding: 100px 60px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.cta-title {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.cta-lead {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px;
  background: var(--bg-soft);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-nav {
  display: flex;
  gap: 32px;
  font-size: 13px;
}

.footer-nav a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--text);
}

/* ---------- Dark mode ---------- */
:root[data-theme="dark"] ::selection { background: rgba(255, 255, 255, 0.12); }

:root[data-theme="dark"] .site-header {
  background: rgba(10, 10, 12, 0.72);
  border-bottom-color: transparent;
}

:root[data-theme="dark"] .site-header.is-scrolled {
  background: rgba(10, 10, 12, 0.95);
  border-bottom-color: var(--border);
}

:root[data-theme="dark"] .btn-primary {
  color: #0a0a0c;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

:root[data-theme="dark"] .btn-primary:hover {
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
}

:root[data-theme="dark"] .hero::before {
  background: radial-gradient(ellipse 80% 60% at 70% 20%, rgba(255, 255, 255, 0.04), transparent 70%);
}

:root[data-theme="dark"] .platform-card--soon {
  background: linear-gradient(180deg, #141418 0%, #0f0f12 100%);
}

:root[data-theme="dark"] .platform-card-tag {
  background: var(--surface-2);
  color: var(--text-secondary);
}

:root[data-theme="dark"] .platform-card-tag--soon {
  background: rgba(234, 179, 8, 0.12);
  color: #fbbf24;
}

:root[data-theme="dark"] .platform-card--soon .platform-card-specs li {
  background: var(--surface);
}

:root[data-theme="dark"]::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.22);
}

:root[data-theme="dark"]::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.36);
}

:root[data-theme="dark"] {
  scrollbar-color: rgba(255, 255, 255, 0.22) transparent;
}

/* ---------- Sponsor page ---------- */
.sponsor-hero {
  position: relative;
  min-height: 70svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + 80px) 24px 100px;
  text-align: center;
}

.sponsor-hero-inner {
  max-width: 720px;
}

.sponsor-hero-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.sponsor-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(48px, 6.5vw, 72px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 24px;
}

.sponsor-hero-lead {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 36px;
}

.sponsor-hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.pro-hero-card {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.pro-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.pro-hero-badge svg {
  width: 16px;
  height: 16px;
  color: var(--text);
}

.pro-hero-card h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.pro-hero-card > p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.pro-hero-note {
  display: inline-block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  border: 1px solid var(--border);
}

.benefits-section { background: var(--bg-soft) !important; }

.benefits-notice {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  max-width: 720px;
  margin: 0 auto 48px;
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.2);
  color: var(--text-secondary);
}

.benefits-notice svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: #d97706;
}

.benefits-notice strong {
  color: var(--text);
}

.benefits-notice p {
  font-size: 13px;
  margin-top: 2px;
}

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

.benefit-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.benefit-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.benefit-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--bg-soft);
  color: var(--text);
  margin-bottom: 20px;
}

.benefit-icon svg {
  width: 22px;
  height: 22px;
}

.benefit-no {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: 10px;
}

.benefit-card h3 {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.benefit-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.benefits-foot {
  text-align: center;
  margin-top: 56px;
}

.benefits-foot-note {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 18px;
}

.benefits-foot-note a {
  font-weight: 600;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.pricing-section { background: var(--bg) !important; }

.price-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 920px;
  margin: 0 auto;
}

.price-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.price-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.price-card--best {
  border-color: var(--text);
  box-shadow: var(--shadow-lg);
}

.price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
}

.price-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.price-value {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 4px;
}

.price-cny {
  font-size: 20px;
  font-weight: 600;
  margin-right: 2px;
}

.price-unit {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.price-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-secondary);
}

.price-note {
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 32px;
}

.trial-banner {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  text-align: center;
}

.trial-banner-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.trial-banner p {
  font-size: 14px;
  color: var(--text-secondary);
}

.trial-banner-link {
  margin-top: 12px;
}

.trial-banner-link a {
  font-weight: 600;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.why-section { background: var(--bg-soft) !important; }

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

.cost-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.cost-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.cost-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--bg-soft);
  color: var(--text);
  margin-bottom: 20px;
}

.cost-icon svg {
  width: 22px;
  height: 22px;
}

.cost-card h3 {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.cost-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.why-foot {
  text-align: center;
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 48px;
  line-height: 1.8;
}

.why-foot strong {
  color: var(--text);
}

.why-doc-link {
  display: inline-block;
  margin-top: 8px;
  font-weight: 600;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Sponsor dark mode */
:root[data-theme="dark"] .benefits-notice {
  background: rgba(251, 191, 36, 0.1);
  border-color: rgba(251, 191, 36, 0.22);
}

:root[data-theme="dark"] .benefits-notice svg {
  color: #fbbf24;
}

:root[data-theme="dark"] .price-card--best {
  border-color: var(--text);
}

:root[data-theme="dark"] .price-badge {
  background: var(--text);
  color: var(--bg);
}

/* ---------- Activate page ---------- */
.activate-hero {
  position: relative;
  min-height: 50svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + 80px) 24px 60px;
  text-align: center;
}

.activate-hero-inner {
  max-width: 720px;
}

.activate-hero-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.activate-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5.5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 20px;
}

.activate-hero-lead {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto;
}

.activate-section {
  background: var(--bg-soft) !important;
  padding-top: 80px;
  padding-bottom: 140px;
}

.activate-tabs {
  display: flex;
  justify-content: center;
  gap: 4px;
  max-width: 360px;
  margin: 0 auto 32px;
  background: var(--surface);
  border-radius: 999px;
  padding: 4px;
  border: 1px solid var(--border);
}

.activate-tab {
  flex: 1;
  padding: 11px 0;
  border: none;
  border-radius: 999px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--text-secondary);
  text-align: center;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition: color 0.25s ease, background 0.25s ease;
}

.activate-tab:hover {
  color: var(--text);
}

.activate-tab.active {
  background: var(--accent);
  color: var(--bg);
  box-shadow: var(--shadow);
}

.activate-card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.activate-card:focus-within {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}

.activate-field {
  margin-bottom: 22px;
}

.activate-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.activate-field input {
  width: 100%;
  box-sizing: border-box;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.activate-field input::placeholder {
  color: var(--text-tertiary);
}

.activate-field input:focus {
  border-color: var(--text-secondary);
  background: var(--bg);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.activate-field .hint-text {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 8px;
  line-height: 1.5;
}

.activate-submit {
  display: block;
  width: 100%;
  padding: 15px 20px;
  border: none;
  border-radius: 999px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  background: var(--accent);
  color: var(--bg);
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  margin-top: 8px;
}

.activate-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
}

.activate-submit:active:not(:disabled) {
  transform: scale(0.99);
}

.activate-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.activate-msg {
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: none;
  line-height: 1.6;
}

.activate-msg.success {
  display: block;
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
  border: 1px solid rgba(34, 197, 94, 0.25);
}

.activate-msg.error {
  display: block;
  background: rgba(239, 68, 68, 0.08);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.activate-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

.activate-footer a {
  font-weight: 600;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 420px;
  width: calc(100vw - 48px);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  transition: transform 0.25s ease;
}

.modal-overlay.show .modal-dialog {
  transform: scale(1);
}

.modal-dialog h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
}

.modal-dialog .modal-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 22px;
  line-height: 1.6;
}

.modal-dialog .modal-info {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
}

.modal-dialog .modal-info .mi-row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  padding: 5px 0;
  color: var(--text-secondary);
}

.modal-dialog .modal-info .mi-row .mi-val {
  color: var(--text);
  font-weight: 500;
  word-break: break-all;
  max-width: 60%;
  text-align: right;
}

.modal-btns {
  display: flex;
  gap: 12px;
}

.modal-btns button {
  flex: 1;
  padding: 12px 0;
  border-radius: 999px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition: opacity 0.2s ease, transform 0.1s ease, background 0.2s ease;
}

.modal-btn-cancel {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-strong);
}

.modal-btn-cancel:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.modal-btn-confirm {
  background: var(--accent);
  color: var(--bg);
  border: none;
}

.modal-btn-confirm:hover {
  opacity: 0.9;
}

.modal-btn-confirm:active {
  transform: scale(0.98);
}

/* Activate dark mode */
:root[data-theme="dark"] .activate-msg.success {
  background: rgba(34, 197, 94, 0.12);
  color: #86efac;
  border-color: rgba(34, 197, 94, 0.25);
}

:root[data-theme="dark"] .activate-msg.error {
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
  border-color: rgba(239, 68, 68, 0.25);
}

/* ---------- Changelog ---------- */
.changelog-hero {
  position: relative;
  min-height: 45svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + 80px) 24px 60px;
  text-align: center;
}

.changelog-hero-inner {
  max-width: 720px;
}

.changelog-hero-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.changelog-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5.5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 20px;
}

.changelog-hero-lead {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto 18px;
}

.changelog-stats {
  font-size: 14px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.changelog-section {
  background: var(--bg-soft) !important;
  padding-top: 80px;
}

.cl-list {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 28px;
}

.cl-list::before {
  content: '';
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 0;
  width: 2px;
  background: var(--border-strong);
  border-radius: 1px;
}

.cl-item {
  position: relative;
  padding-bottom: 36px;
}

.cl-item:last-child {
  padding-bottom: 0;
}

.cl-marker {
  position: absolute;
  top: 8px;
  left: -28px;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 2px solid var(--border-strong);
}

.cl-item.is-latest .cl-marker {
  background: var(--text);
  border-color: var(--text);
}

.cl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.35s ease, transform 0.35s ease;
}

.cl-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.cl-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.cl-version {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.cl-date {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-left: auto;
}

.cl-latest-tag,
.cl-pin {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 4px 10px;
  border-radius: 999px;
}

.cl-latest-tag {
  background: var(--text);
  color: var(--bg);
}

.cl-pin {
  background: rgba(234, 179, 8, 0.12);
  color: #b45309;
}

.cl-changes-wrap {
  position: relative;
}

.cl-changes-wrap.is-collapsed .cl-changes {
  max-height: 220px;
  overflow: hidden;
  mask-image: linear-gradient(to bottom, black 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 70%, transparent 100%);
}

.cl-changes {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.cl-changes li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.cl-tag {
  display: inline-flex;
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  margin-top: 2px;
}

.cl-tag.is-new {
  background: rgba(34, 197, 94, 0.12);
  color: #16a34a;
}

.cl-tag.is-fix {
  background: rgba(59, 130, 246, 0.12);
  color: #2563eb;
}

.cl-tag.is-opt {
  background: rgba(168, 85, 247, 0.12);
  color: #9333ea;
}

.cl-tag.is-pro {
  background: rgba(234, 179, 8, 0.14);
  color: #b45309;
}

.cl-tag.is-untested {
  background: rgba(107, 114, 128, 0.12);
  color: #4b5563;
}

.cl-tag.is-experimental {
  background: rgba(236, 72, 153, 0.12);
  color: #db2777;
}

.cl-tag.is-deprecated {
  background: rgba(239, 68, 68, 0.12);
  color: #dc2626;
}

.cl-tag.is-wip {
  background: rgba(14, 165, 233, 0.12);
  color: #0284c7;
}

.cl-text {
  flex: 1;
}

.cl-plain {
  padding-left: 0;
}

.cl-note {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
}

.cl-expand {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.cl-expand:hover {
  color: var(--text);
  background: var(--accent-soft);
}

.cl-expand svg {
  width: 14px;
  height: 14px;
  transition: transform 0.25s ease;
}

.cl-changes-wrap:not(.is-collapsed) .cl-expand svg {
  transform: rotate(180deg);
}

/* ---------- changelog 形态切换（Android 手机/平板/车机） ---------- */

.cl-flavor-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  max-width: 100%;
  padding: 4px;
  margin-bottom: 22px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.cl-flavor-btn {
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  cursor: pointer;
  padding: 8px 18px;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--text-secondary);
  background: transparent;
  border-radius: 999px;
  transition: color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.cl-flavor-btn:hover {
  color: var(--text);
  background: var(--accent-soft);
}

.cl-flavor-btn.is-active {
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.1), 0 0 0 1px var(--border);
}

:root[data-theme="dark"] .cl-flavor-btn.is-active {
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.45), 0 0 0 1px var(--border);
}

@media (max-width: 520px) {
  .cl-flavor-btn {
    padding: 7px 14px;
    font-size: 13px;
  }
}

.cl-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.cl-foot-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.cl-size {
  font-size: 13px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.cl-hash {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}

.cl-hash-label {
  font-weight: 600;
}

.cl-hash-value {
  font-family: var(--font-mono);
  font-size: 12px;
}

.cl-hash-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.cl-hash-copy:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.cl-hash-copy svg {
  width: 14px;
  height: 14px;
}

.cl-dl-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.cl-dl {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.cl-dl:hover {
  background: var(--accent-soft);
  border-color: var(--border-strong);
}

.cl-dl svg {
  width: 14px;
  height: 14px;
}

.cl-state {
  text-align: center;
  padding: 60px 24px;
  color: var(--text-secondary);
  font-size: 15px;
}

.load-more-wrap {
  display: flex;
  justify-content: center;
  margin-top: 48px;
}

/* Changelog dark mode */
:root[data-theme="dark"] .cl-pin {
  background: rgba(234, 179, 8, 0.14);
  color: #fbbf24;
}

:root[data-theme="dark"] .cl-tag.is-new {
  background: rgba(34, 197, 94, 0.14);
  color: #86efac;
}

:root[data-theme="dark"] .cl-tag.is-fix {
  background: rgba(59, 130, 246, 0.14);
  color: #93c5fd;
}

:root[data-theme="dark"] .cl-tag.is-opt {
  background: rgba(168, 85, 247, 0.14);
  color: #d8b4fe;
}

:root[data-theme="dark"] .cl-tag.is-pro {
  background: rgba(234, 179, 8, 0.16);
  color: #fcd34d;
}

:root[data-theme="dark"] .cl-tag.is-untested {
  background: rgba(156, 163, 175, 0.14);
  color: #d1d5db;
}

:root[data-theme="dark"] .cl-tag.is-experimental {
  background: rgba(236, 72, 153, 0.14);
  color: #f9a8d4;
}

:root[data-theme="dark"] .cl-tag.is-deprecated {
  background: rgba(239, 68, 68, 0.14);
  color: #fca5a5;
}

:root[data-theme="dark"] .cl-tag.is-wip {
  background: rgba(14, 165, 233, 0.14);
  color: #7dd3fc;
}

/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s cubic-bezier(0.22, 1, 0.36, 1) var(--reveal-delay, 0ms),
    transform 1s cubic-bezier(0.22, 1, 0.36, 1) var(--reveal-delay, 0ms);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-screenshot, .platform-card, .feature-card { transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 64px;
    text-align: center;
  }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-visual { order: -1; height: 440px; }
  .hero-screenshot--desktop { width: 520px; max-width: 100%; }
  .hero-screenshot--phone { width: 140px; right: calc(50% - 280px); bottom: 20px; }
  .hero-bottom { justify-content: center; gap: 48px; }

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

  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .cost-grid { grid-template-columns: repeat(2, 1fr); }
  .price-grid { grid-template-columns: repeat(2, 1fr); max-width: 560px; }
}

@media (max-width: 760px) {
  .menu-toggle { display: flex; }
  .header-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 20px;
    box-shadow: var(--shadow);
  }
  body.nav-open .header-nav { display: flex; }
  .header-nav a {
    padding: 14px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--border);
  }
  .header-nav a:last-child { border-bottom: none; }

  .section { padding: 100px 20px; }
  .section-header { margin-bottom: 56px; }

  .hero { padding-top: calc(var(--header-h) + 40px); padding-bottom: 60px; }
  .hero-title { font-size: clamp(40px, 11vw, 56px); }
  .hero-screenshot--desktop { width: 340px; max-width: 100%; }
  .hero-screenshot--phone { width: 100px; right: calc(50% - 180px); bottom: 10px; }
  .hero-actions { flex-direction: column; gap: 16px; }
  .hero-bottom { gap: 32px; }

  .platform-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .changelog-wrap { grid-template-columns: 1fr; gap: 48px; }

  .benefit-grid,
  .cost-grid,
  .price-grid { grid-template-columns: 1fr; max-width: 100%; }

  .sponsor-hero { min-height: auto; padding: calc(var(--header-h) + 40px) 20px 80px; }
  .sponsor-hero-actions { flex-direction: column; gap: 16px; }
  .pro-hero-card { padding: 32px 24px; }
  .benefits-notice { margin-bottom: 36px; }
  .benefit-card,
  .cost-card,
  .price-card { padding: 28px 24px; }

  .activate-hero { min-height: auto; padding: calc(var(--header-h) + 40px) 20px 60px; }
  .activate-section { padding-top: 60px; padding-bottom: 100px; }
  .activate-card { padding: 28px 24px; }
  .modal-dialog { padding: 24px; }

  .changelog-hero { min-height: auto; padding: calc(var(--header-h) + 40px) 20px 60px; }
  .changelog-section { padding-top: 60px; }
  .cl-list { padding-left: 20px; }
  .cl-marker { left: -20px; }
  .cl-card { padding: 22px; }
  .cl-head { margin-bottom: 14px; }
  .cl-date { margin-left: 0; width: 100%; }
  .cl-foot { flex-direction: column; align-items: flex-start; gap: 14px; }

  .cta-card { padding: 72px 28px; }

  .footer-inner { flex-direction: column; text-align: center; gap: 20px; }
  .footer-nav { flex-wrap: wrap; justify-content: center; gap: 20px; }
}