:root {
  --accent: #3184fe;
  --accent-2: #79b7ff;
  --bg: #f4f8ff;
  --bg-2: #e3eefc;
  --panel: rgba(255, 255, 255, 0.72);
  --panel-strong: rgba(255, 255, 255, 0.86);
  --text: #101826;
  --muted: rgba(16, 24, 38, 0.70);
  --line: rgba(49, 132, 254, 0.14);
  --shadow: 0 22px 56px rgba(28, 77, 160, 0.12);
  --radius: 23px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #08111d;
    --bg-2: #0e1c31;
    --panel: rgba(11, 21, 38, 0.72);
    --panel-strong: rgba(18, 31, 57, 0.84);
    --text: #edf5ff;
    --muted: rgba(237, 245, 255, 0.72);
    --line: rgba(121, 183, 255, 0.16);
    --shadow: 0 24px 64px rgba(0, 0, 0, 0.34);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -10%, rgba(49, 132, 254, 0.24), transparent 34%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
  min-height: 100vh;
}
.backdrop {
  position: fixed; inset: 0;
  background: rgba(3, 8, 18, 0.40);
  opacity: 0; pointer-events: none;
  transition: opacity .22s ease;
  z-index: 18;
}
.nav-toggle { position: fixed; opacity: 0; pointer-events: none; }
.menu-btn {
  position: fixed; left: 18px; top: 18px; z-index: 22;
  width: 42px; height: 42px; border-radius: 14px;
  display: block;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid var(--line);
  box-shadow: 0 12px 28px rgba(28, 77, 160, 0.12);
  backdrop-filter: blur(18px);
  cursor: pointer;
  transition: opacity .18s ease, transform .18s ease;
}
.menu-btn span {
  position: absolute;
  left: 50%;
  top: 50%;
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
  transform: translate(-50%, -50%);
}
.menu-btn span:nth-child(1) { transform: translate(-50%, calc(-50% - 7px)); }
.menu-btn span:nth-child(2) { transform: translate(-50%, -50%); }
.menu-btn span:nth-child(3) { transform: translate(-50%, calc(-50% + 7px)); }
@media (prefers-color-scheme: dark) {
  .menu-btn { background: rgba(11, 21, 38, 0.62); }
}
.drawer {
  position: fixed; inset: 0 auto 0 0; width: min(84vw, 320px); z-index: 25;
  transform: translateX(-102%); transition: transform .24s ease;
  background: var(--panel);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(28px);
  padding: 20px;
  box-shadow: var(--shadow);
}
.nav-toggle:checked ~ .drawer { transform: translateX(0); }
.nav-toggle:checked ~ .backdrop { opacity: 1; pointer-events: auto; }
.nav-toggle:checked ~ .menu-btn { opacity: 0; transform: scale(.86); pointer-events: none; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.drawer-head strong { display: block; font-size: 22px; }
.drawer-head small { color: var(--muted); }
.drawer-close { font-size: 34px; line-height: 1; cursor: pointer; color: var(--text); text-decoration: none; }
.drawer-nav { display: grid; gap: 10px; padding-top: 16px; }
.drawer-nav a {
  text-decoration: none; color: var(--text);
  padding: 14px 16px; border-radius: 18px;
  background: rgba(255,255,255,0.26); border: 1px solid transparent;
}
@media (prefers-color-scheme: dark) {
  .drawer-nav a { background: rgba(255,255,255,0.04); }
}
.drawer-nav a.active { border-color: rgba(49,132,254,0.24); background: linear-gradient(135deg, rgba(49,132,254,0.18), rgba(121,183,255,0.12)); }
.glass-titlebar {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 20;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.58);
  backdrop-filter: blur(22px);
  transition: opacity .22s ease, transform .22s ease;
}
.glass-titlebar.visible { opacity: 1; transform: translateY(0); }
.titlebar-inner { font-size: 18px; font-weight: 700; color: var(--text); }
@media (prefers-color-scheme: dark) {
  .glass-titlebar { background: rgba(8,17,29,0.62); }
}
.page-shell { padding-top: 84px; }
.hero-head { padding: 10px 0 18px; }
.hero-head-inner { display: flex; align-items: center; justify-content: flex-start; }
.brand-title { text-align: left; }
.brand-title strong { display: block; font-size: 34px; letter-spacing: 0; }
.brand-title span { color: var(--muted); }
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.content-area { padding-bottom: 36px; }
.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0 34px;
  text-align: center;
}
.site-footer small {
  color: rgba(120, 132, 150, 0.78);
  font-size: 12px;
  font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  .site-footer small { color: rgba(220, 230, 245, 0.56); }
}
.card {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  overflow: hidden;
}
.hero-panel {
  position: relative;
  overflow: hidden;
}
.flagship-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, .72fr);
  gap: 34px;
  align-items: center;
  min-height: 520px;
  padding: 58px;
  border-radius: 32px;
  border: 1px solid rgba(49,132,254,0.16);
  background:
    radial-gradient(circle at 78% 18%, rgba(49,132,254,0.24), transparent 34%),
    linear-gradient(135deg, rgba(255,255,255,0.88), rgba(255,255,255,0.56));
  box-shadow: 0 30px 80px rgba(28,77,160,0.14);
  backdrop-filter: blur(28px);
}
.flagship-hero::before {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: 31px;
  background: linear-gradient(120deg, rgba(255,255,255,0.70), transparent 34%, rgba(49,132,254,0.10));
  pointer-events: none;
}
.hero-content, .hero-showcase { position: relative; z-index: 1; }
@media (prefers-color-scheme: dark) {
  .flagship-hero {
    background:
      radial-gradient(circle at 78% 18%, rgba(49,132,254,0.28), transparent 38%),
      linear-gradient(135deg, rgba(13,23,43,0.86), rgba(13,23,43,0.58));
    box-shadow: 0 32px 88px rgba(0,0,0,0.34);
  }
  .flagship-hero::before { background: linear-gradient(120deg, rgba(255,255,255,0.08), transparent 34%, rgba(49,132,254,0.12)); }
}
.hero-icon-wrap { display: flex; justify-content: center; margin-bottom: 18px; }
.hero-icon {
  position: relative;
  width: 142px; height: 142px; border-radius: 32px;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.52);
  box-shadow: 0 22px 42px rgba(49, 132, 254, 0.24), 0 0 42px rgba(49, 132, 254, 0.16);
  overflow: hidden;
  background: #3184fe;
}
.logo-icon img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
  transform: scale(1.18);
}
.logo-icon::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.18), transparent 42%, rgba(0,0,0,0.18));
  pointer-events: none;
}
.icon-version {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1;
  transform: translate(-50%, -50%);
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  background: rgba(49,132,254,0.78);
  border: 1px solid rgba(255,255,255,0.42);
  box-shadow: 0 8px 20px rgba(20,70,150,0.22);
  backdrop-filter: blur(12px);
}
.hero-kicker {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--accent);
  background: rgba(49, 132, 254, 0.10);
  border: 1px solid rgba(49, 132, 254, 0.14);
  font-size: 14px;
  font-weight: 800;
}
.hero-panel h1 { margin: 18px 0 0; font-size: clamp(56px, 8vw, 96px); line-height: .96; }
.hero-lead { margin: 18px 0 0; font-size: clamp(24px, 3vw, 38px); font-weight: 800; color: var(--text); line-height: 1.18; }
.hero-desc { margin: 18px 0 0; max-width: 58ch; font-size: 17px; line-height: 1.9; color: var(--muted); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 0; max-width: 680px; }
.hero-meta span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.52);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
}
.hero-showcase {
  display: grid;
  justify-items: center;
  gap: 14px;
  padding: 24px;
  border-radius: 28px;
  border: 1px solid rgba(49,132,254,0.12);
  background: rgba(255,255,255,0.32);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.42);
  backdrop-filter: blur(20px);
}
.showcase-card {
  width: min(100%, 280px);
  padding: 16px 18px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.58);
  box-shadow: 0 14px 32px rgba(28,77,160,0.12);
}
.showcase-card span { display: block; color: var(--accent); font-size: 12px; font-weight: 900; text-transform: uppercase; }
.showcase-card strong { display: block; margin-top: 6px; font-size: 24px; }
.build-card strong { font-size: 17px; }
@media (prefers-color-scheme: dark) {
  .hero-meta span { background: rgba(255,255,255,0.06); }
  .hero-showcase { background: rgba(255,255,255,0.05); box-shadow: inset 0 1px 0 rgba(255,255,255,0.08); }
  .showcase-card { background: rgba(255,255,255,0.06); }
}
.section-title-block { text-align: center; padding: 28px 0 18px; }
.section-title-block.compact { padding: 8px 0 24px; }
.section-title-block h1, .section-title-block h2 { margin: 0; font-size: clamp(34px, 5vw, 52px); }
.section-title-block p { margin: 14px auto 0; max-width: 44ch; color: var(--muted); line-height: 1.8; }
.product-section { margin-top: 26px; }
.preview-block {
  position: relative;
  margin-top: 18px;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255,255,255,0.78), rgba(255,255,255,0.50)),
    linear-gradient(120deg, rgba(49,132,254,0.13), rgba(121,183,255,0.04), rgba(49,132,254,0.13));
  background-size: 100% 100%, 220% 220%;
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  overflow: hidden;
  animation: cardEnter .7s ease both, gradientFlow 7s ease-in-out infinite;
}
.preview-block:nth-of-type(2) { animation-delay: .08s, 0s; }
.preview-block:nth-of-type(3) { animation-delay: .16s, 0s; }
.preview-block.last { padding-bottom: 24px; }
@media (prefers-color-scheme: dark) {
  .preview-block {
    background:
      linear-gradient(135deg, rgba(13,23,43,0.78), rgba(13,23,43,0.54)),
      linear-gradient(120deg, rgba(49,132,254,0.20), rgba(121,183,255,0.04), rgba(49,132,254,0.16));
  }
}
.preview-copy { padding: 0 2px 18px; }
.preview-copy h3 { margin: 0 0 10px; font-size: 24px; }
.preview-copy p { margin: 0; color: var(--muted); line-height: 1.75; }
.preview-frame { position: relative; }
.preview-strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(190px, 1fr);
  gap: 12px;
  overflow-x: auto;
  padding: 2px 52px 10px;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
}
.preview-strip::-webkit-scrollbar { display: none; }
.preview-strip.two { grid-auto-columns: minmax(240px, 1fr); }
.preview-btn {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
  color: var(--text);
  box-shadow: 0 12px 28px rgba(28, 77, 160, 0.16);
  backdrop-filter: blur(16px);
  transform: translateY(-50%);
  cursor: pointer;
  font-size: 28px;
  line-height: 1;
}
.preview-btn.prev { left: 6px; }
.preview-btn.next { right: 6px; }
@media (prefers-color-scheme: dark) {
  .preview-btn { background: rgba(11,21,38,0.70); }
}
.preview-strip img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: 0 14px 34px rgba(32, 86, 171, 0.12);
  scroll-snap-align: start;
}
.page-kicker {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--accent);
  border: 1px solid rgba(49,132,254,0.16);
  background: rgba(49,132,254,0.10);
  font-size: 14px;
  font-weight: 700;
}
.feature-pills { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.feature-pills span {
  padding: 9px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.42);
  color: var(--text);
  font-size: 14px;
}
.tutorial-hero, .log-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 86% 18%, rgba(49,132,254,0.24), transparent 34%),
    linear-gradient(135deg, rgba(255,255,255,0.82), rgba(255,255,255,0.50));
}
.tutorial-hero { display: block; padding: 42px 32px; }
.tutorial-copy h1, .log-hero h1 { margin: 14px 0 0; font-size: clamp(42px, 6vw, 70px); line-height: 1.04; }
.tutorial-copy p, .log-hero p { margin: 18px 0 0; max-width: 60ch; color: var(--muted); line-height: 1.9; font-size: 17px; }
.tutorial-orbit {
  justify-self: center;
  width: 170px;
  height: 170px;
  border-radius: 42px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(145deg, rgba(49,132,254,0.88), rgba(121,183,255,0.68)),
    radial-gradient(circle at 35% 20%, rgba(255,255,255,0.62), transparent 34%);
  box-shadow: 0 24px 54px rgba(49,132,254,0.26);
  animation: cardEnter .7s ease both;
}
.orbit-core {
  width: 96px;
  height: 96px;
  border-radius: 32px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  border: 1px solid rgba(255,255,255,0.38);
  background: rgba(255,255,255,0.16);
  backdrop-filter: blur(14px);
}
.video-stage { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr); gap: 18px; margin-top: 20px; }
.video-panel { padding: 16px; }
.video-topline { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 4px 4px 14px; }
.video-topline span { display: block; color: var(--accent); font-size: 13px; font-weight: 800; text-transform: uppercase; }
.video-topline strong { display: block; margin-top: 4px; font-size: 20px; }
.video-topline em { font-style: normal; padding: 7px 11px; border-radius: 999px; background: rgba(49,132,254,0.12); color: var(--accent); font-weight: 800; }
video { width: 100%; display: block; border-radius: var(--radius); background: #000; }
.tutorial-notes { display: grid; gap: 18px; }
.tutorial-notes article {
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  animation: cardEnter .7s ease both;
}
.tutorial-notes article:nth-child(2) { animation-delay: .08s; }
.tutorial-notes span { color: var(--accent); font-weight: 900; }
.tutorial-notes h2 { margin: 10px 0 8px; font-size: 24px; }
.tutorial-notes p { margin: 0; color: var(--muted); line-height: 1.75; }
.log-hero { padding: 44px 30px; text-align: center; }
.log-hero p { margin-left: auto; margin-right: auto; }
.log-hero .feature-pills { justify-content: center; }
.release-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 20px; }
.release-card {
  position: relative;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255,255,255,0.76), rgba(255,255,255,0.48)),
    linear-gradient(120deg, rgba(49,132,254,0.12), rgba(121,183,255,0.03), rgba(49,132,254,0.12));
  background-size: 100% 100%, 220% 220%;
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  overflow: hidden;
  animation: cardEnter .7s ease both, gradientFlow 8s ease-in-out infinite;
}
.release-card.speed { animation-delay: .08s, 0s; }
.release-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.release-head span { color: var(--accent); font-size: 13px; font-weight: 800; text-transform: uppercase; }
.release-head h2 { margin: 8px 0 0; font-size: clamp(24px, 3vw, 34px); }
.release-head strong { flex: 0 0 auto; padding: 8px 12px; border-radius: 999px; color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 12px 28px rgba(49,132,254,0.20); }
.release-desc { color: var(--muted); line-height: 1.8; }
.release-list { margin-top: 16px; padding-left: 0; list-style: none; }
.release-list li { position: relative; margin: 10px 0; padding-left: 26px; color: var(--muted); line-height: 1.65; }
.release-list li::before { content: ""; position: absolute; left: 0; top: .72em; width: 8px; height: 8px; border-radius: 999px; background: var(--accent); box-shadow: 0 0 0 5px rgba(49,132,254,0.10); }
.contact-hero {
  position: relative;
  padding: 46px 28px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0, rgba(49,132,254,0.24), transparent 42%),
    linear-gradient(135deg, rgba(255,255,255,0.80), rgba(255,255,255,0.48));
}
.contact-hero h1 { margin: 12px 0 0; font-size: clamp(42px, 6vw, 68px); line-height: 1.04; }
.contact-hero p { margin: 18px auto 0; max-width: 58ch; color: var(--muted); line-height: 1.9; font-size: 17px; }
.contact-kicker {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--accent);
  border: 1px solid rgba(49,132,254,0.16);
  background: rgba(49,132,254,0.10);
  font-size: 14px;
}
.contact-grid { display: grid; gap: 18px; margin-top: 20px; }
.developers-hero {
  padding: 46px 30px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0, rgba(49,132,254,0.25), transparent 42%),
    linear-gradient(135deg, rgba(255,255,255,0.82), rgba(255,255,255,0.50));
}
.developers-hero h1 { margin: 14px 0 0; font-size: clamp(42px, 6vw, 68px); line-height: 1.04; }
.developers-hero > p { max-width: 58ch; margin: 18px auto 0; color: var(--muted); line-height: 1.9; font-size: 17px; }
.developer-stats { display: flex; justify-content: center; flex-wrap: wrap; gap: 34px; margin-top: 28px; }
.developer-stats div { min-width: 102px; }
.developer-stats strong { display: block; color: var(--accent); font-size: 28px; line-height: 1; }
.developer-stats span { display: block; margin-top: 7px; color: var(--muted); font-size: 13px; }
.developer-grid { display: grid; gap: 18px; margin-top: 20px; }
.developer-card {
  position: relative;
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  align-items: center;
  gap: 28px;
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255,255,255,0.78), rgba(255,255,255,0.48)),
    linear-gradient(120deg, rgba(49,132,254,0.13), rgba(121,183,255,0.03), rgba(49,132,254,0.12));
  background-size: 100% 100%, 220% 220%;
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  overflow: hidden;
  animation: cardEnter .7s ease both, gradientFlow 8s ease-in-out infinite;
}
.developer-card:nth-child(2) { animation-delay: .10s, 0s; }
.developer-card.lead { border-color: rgba(49,132,254,0.28); }
.developer-avatar {
  width: 150px;
  height: 150px;
  padding: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), rgba(121,183,255,0.30));
  box-shadow: 0 20px 44px rgba(49,132,254,0.22);
}
.developer-avatar img { width: 100%; height: 100%; display: block; border-radius: 50%; object-fit: cover; object-position: center; border: 3px solid rgba(255,255,255,0.82); }
.developer-role { color: var(--accent); font-size: 13px; font-weight: 900; text-transform: uppercase; }
.developer-info h2 { margin: 8px 0 4px; font-size: clamp(30px, 4vw, 44px); }
.developer-title { margin: 0; font-weight: 800; color: var(--text); }
.developer-info > p:last-of-type { margin: 14px 0 0; color: var(--muted); line-height: 1.85; max-width: 64ch; }
.developer-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.developer-tags span { padding: 8px 12px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,0.48); color: var(--text); font-size: 13px; font-weight: 700; }
.access-hero {
  padding: 50px 30px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0, rgba(49,132,254,0.26), transparent 42%),
    linear-gradient(135deg, rgba(255,255,255,0.84), rgba(255,255,255,0.52));
}
.access-hero h1 { margin: 14px 0 0; font-size: clamp(44px, 6vw, 70px); line-height: 1.04; }
.access-hero p { max-width: 56ch; margin: 18px auto 0; color: var(--muted); line-height: 1.9; font-size: 17px; }
.purchase-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  margin-top: 26px;
  padding: 0 22px;
  border-radius: 16px;
  color: #fff;
  background: linear-gradient(135deg, #2678ed, #59a9ff);
  box-shadow: 0 16px 32px rgba(49,132,254,0.28);
  text-decoration: none;
  font-weight: 800;
  transition: transform .18s ease, box-shadow .18s ease;
}
.purchase-link:hover { transform: translateY(-2px); box-shadow: 0 20px 38px rgba(49,132,254,0.34); }
.access-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 20px; }
.access-card {
  position: relative;
  min-height: 280px;
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255,255,255,0.78), rgba(255,255,255,0.48)),
    linear-gradient(120deg, rgba(49,132,254,0.13), rgba(121,183,255,0.03), rgba(49,132,254,0.12));
  background-size: 100% 100%, 220% 220%;
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  overflow: hidden;
  animation: cardEnter .7s ease both, gradientFlow 8s ease-in-out infinite;
}
.access-card.open { animation-delay: .10s, 0s; }
.access-index { display: inline-flex; color: var(--accent); font-size: 14px; font-weight: 900; }
.access-card h2 { margin: 16px 0 12px; font-size: clamp(28px, 4vw, 40px); }
.access-card p { margin: 0; color: var(--muted); line-height: 1.85; }
.access-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.access-tags span { padding: 8px 12px; border-radius: 999px; background: rgba(255,255,255,0.48); border: 1px solid var(--line); color: var(--text); font-size: 13px; font-weight: 700; }
.access-action { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 20px; padding: 28px; }
.access-action > div > span { color: var(--accent); font-size: 13px; font-weight: 900; text-transform: uppercase; }
.access-action h2 { margin: 8px 0 8px; font-size: clamp(28px, 4vw, 40px); }
.access-action p { margin: 0; color: var(--muted); line-height: 1.75; }
.purchase-link.compact { flex: 0 0 auto; margin: 0; }
.contact-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(190px, 240px);
  align-items: center;
  gap: 22px;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255,255,255,0.76), rgba(255,255,255,0.48)),
    linear-gradient(120deg, rgba(49,132,254,0.13), rgba(121,183,255,0.03), rgba(49,132,254,0.12));
  background-size: 100% 100%, 220% 220%;
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  overflow: hidden;
  animation: cardEnter .7s ease both, gradientFlow 8s ease-in-out infinite;
}
.contact-card:nth-child(2) { animation-delay: .08s, 0s; }
.contact-card:nth-child(3) { animation-delay: .16s, 0s; }
.contact-card.featured { border-color: rgba(49,132,254,0.28); }
.contact-copy span { color: var(--accent); font-size: 13px; font-weight: 800; text-transform: uppercase; }
.contact-copy h2 { margin: 10px 0 10px; font-size: clamp(26px, 4vw, 38px); }
.contact-copy p { margin: 0; color: var(--muted); line-height: 1.8; }
.qr-frame {
  justify-self: end;
  width: min(100%, 230px);
  padding: 10px;
  border-radius: 24px;
  background: rgba(255,255,255,0.72);
  border: 1px solid rgba(49,132,254,0.16);
  box-shadow: 0 16px 36px rgba(28,77,160,0.16);
}
.qr-frame img { width: 100%; display: block; border-radius: 18px; object-fit: cover; }
@media (prefers-color-scheme: dark) {
  .feature-pills span, .developer-tags span { background: rgba(255,255,255,0.06); }
  .developers-hero {
    background:
      radial-gradient(circle at 50% 0, rgba(49,132,254,0.28), transparent 44%),
      linear-gradient(135deg, rgba(13,23,43,0.82), rgba(13,23,43,0.56));
  }
  .developer-card {
    background:
      linear-gradient(135deg, rgba(13,23,43,0.78), rgba(13,23,43,0.54)),
      linear-gradient(120deg, rgba(49,132,254,0.20), rgba(121,183,255,0.04), rgba(49,132,254,0.16));
  }
  .access-hero {
    background:
      radial-gradient(circle at 50% 0, rgba(49,132,254,0.28), transparent 44%),
      linear-gradient(135deg, rgba(13,23,43,0.82), rgba(13,23,43,0.56));
  }
  .access-card { background: linear-gradient(135deg, rgba(13,23,43,0.78), rgba(13,23,43,0.54)), linear-gradient(120deg, rgba(49,132,254,0.20), rgba(121,183,255,0.04), rgba(49,132,254,0.16)); }
  .access-tags span { background: rgba(255,255,255,0.06); }
  .developer-avatar img { border-color: rgba(255,255,255,0.20); }
  .tutorial-hero, .log-hero {
    background:
      radial-gradient(circle at 86% 18%, rgba(49,132,254,0.26), transparent 38%),
      linear-gradient(135deg, rgba(13,23,43,0.82), rgba(13,23,43,0.56));
  }
  .release-card {
    background:
      linear-gradient(135deg, rgba(13,23,43,0.78), rgba(13,23,43,0.54)),
      linear-gradient(120deg, rgba(49,132,254,0.20), rgba(121,183,255,0.04), rgba(49,132,254,0.16));
  }
  .contact-hero {
    background:
      radial-gradient(circle at 50% 0, rgba(49,132,254,0.25), transparent 44%),
      linear-gradient(135deg, rgba(13,23,43,0.82), rgba(13,23,43,0.56));
  }
  .contact-card {
    background:
      linear-gradient(135deg, rgba(13,23,43,0.78), rgba(13,23,43,0.54)),
      linear-gradient(120deg, rgba(49,132,254,0.20), rgba(121,183,255,0.04), rgba(49,132,254,0.16));
  }
  .qr-frame { background: rgba(255,255,255,0.08); }
}
ol { margin: 12px 0 0; padding-left: 20px; }
li { margin: 8px 0; color: var(--muted); line-height: 1.65; }
@keyframes cardEnter {
  from { opacity: 0; transform: translateY(24px); filter: blur(8px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}
@keyframes gradientFlow {
  0%, 100% { background-position: 0 0, 0% 50%; }
  50% { background-position: 0 0, 100% 50%; }
}
@media (prefers-reduced-motion: reduce) {
  .preview-block, .contact-card, .release-card, .tutorial-notes article, .tutorial-orbit, .developer-card, .access-card { animation: none; }
}
@media (max-width: 900px) {
  .release-grid, .video-stage { grid-template-columns: 1fr; }
  .tutorial-hero { grid-template-columns: 1fr; padding: 34px 20px; }
  .tutorial-orbit { width: 132px; height: 132px; border-radius: 34px; }
  .orbit-core { width: 78px; height: 78px; border-radius: 26px; }
  .log-hero { padding: 36px 20px; }
  .release-head { display: grid; }
  .release-head strong { justify-self: start; }
  .feature-pills { justify-content: flex-start; }
  .log-hero .feature-pills { justify-content: center; }
  .contact-hero, .developers-hero, .access-hero { padding: 36px 20px; }
  .access-grid { grid-template-columns: 1fr; }
  .access-card { min-height: auto; padding: 22px; }
  .access-action { display: grid; padding: 22px; }
  .purchase-link.compact { justify-self: start; }
  .developer-stats { gap: 20px; }
  .developer-card { grid-template-columns: 1fr; justify-items: center; gap: 20px; padding: 22px; text-align: center; }
  .developer-avatar { width: 126px; height: 126px; }
  .developer-tags { justify-content: center; }
  .contact-card { grid-template-columns: 1fr; padding: 20px; }
  .qr-frame { justify-self: stretch; width: min(100%, 280px); margin: 0 auto; }
  .flagship-hero { grid-template-columns: 1fr; min-height: auto; padding: 34px 20px 24px; border-radius: 28px; }
  .hero-showcase { padding: 18px; }
  .hero-panel h1 { font-size: clamp(48px, 14vw, 68px); }
  .hero-lead { font-size: 23px; }
  .hero-icon { width: 126px; height: 126px; border-radius: 28px; }
  .logo-icon img { transform: scale(1.2); }
  .icon-version { top: 50%; font-size: 18px; padding: 6px 14px; }
  .hero-desc { font-size: 16px; line-height: 1.85; }
  .brand-title strong { font-size: 32px; }
  .preview-block { padding: 18px; }
  .page-shell { padding-top: 76px; }
}