:root {
  --bg: #070d1c;
  --bg-soft: #0d1430;
  --surface: #101a36;
  --surface-2: #162248;
  --line: rgba(155, 176, 255, 0.16);
  --text: #f4f7ff;
  --muted: #aeb8d7;
  --blue: #5d8fff;
  --blue-2: #7aa8ff;
  --gold: #f0b54b;
  --orange: #ff8e2b;
  --danger: #ffcf7a;
  --shadow: 0 18px 46px rgba(0, 0, 0, 0.42);
  --radius: 24px;
  --radius-sm: 16px;
  --max: 1220px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(93, 143, 255, 0.16), transparent 22%),
    radial-gradient(circle at top right, rgba(255, 142, 43, 0.12), transparent 28%),
    linear-gradient(180deg, #070d1c 0%, #090f22 100%);
  color: var(--text);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.container {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(7, 13, 28, 0.88);
  border-bottom: 1px solid var(--line);
}

.navbar {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  width: auto;
  height: 42px;
  object-fit: contain;
  display: block;
}

.footer-brand .brand-logo {
  height: 34px;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.desktop-nav a {
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 650;
}
.desktop-nav a:hover,
.desktop-nav a.active {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.button,
.button-secondary,
.button-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 16px;
  border: 1px solid transparent;
  font-weight: 800;
  letter-spacing: -0.02em;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.button:hover,
.button-secondary:hover,
.button-ghost:hover { transform: translateY(-1px); }

.button {
  background: linear-gradient(135deg, var(--blue), var(--blue-2));
  color: white;
  box-shadow: 0 16px 30px rgba(93, 143, 255, 0.28);
}

.button-secondary {
  background: linear-gradient(135deg, #ffb349, #ff8e2b);
  color: #1c1300;
  box-shadow: 0 16px 30px rgba(255, 142, 43, 0.24);
}

.button-ghost {
  background: rgba(255,255,255,0.02);
  border-color: rgba(255,255,255,0.12);
  color: var(--text);
}

.menu-toggle {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  display: none;
  place-items: center;
  font-size: 24px;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: min(340px, 88vw);
  height: 100vh;
  padding: 20px;
  transform: translateX(110%);
  transition: transform 0.24s ease;
  background: linear-gradient(180deg, #0d1430 0%, #091024 100%);
  border-left: 1px solid rgba(255,255,255,0.1);
  box-shadow: -24px 0 70px rgba(0,0,0,0.45);
  z-index: 80;
}
.mobile-menu.open { transform: translateX(0); }
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  transition: 0.24s ease;
  z-index: 70;
}
.mobile-overlay.show { opacity: 1; visibility: visible; }
.mobile-menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.mobile-menu nav { display: grid; gap: 8px; }
.mobile-menu nav a {
  padding: 14px 16px;
  border-radius: 14px;
  color: var(--muted);
  background: rgba(255,255,255,0.03);
}
.mobile-menu nav a.active,
.mobile-menu nav a:hover { color: var(--text); background: rgba(255,255,255,0.08); }
.mobile-menu-actions { margin-top: 20px; display: grid; gap: 12px; }

main { overflow: clip; }
section { padding: 72px 0; }
.hero { padding-top: 20px; }

.hero-shell {
  padding: 14px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 18px;
  align-items: stretch;
}

.panel {
  background: linear-gradient(180deg, rgba(16, 26, 54, 0.96), rgba(9, 16, 36, 0.96));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 42px;
  position: relative;
  overflow: hidden;
}
.hero-copy::after {
  content: "";
  position: absolute;
  inset: auto -20% -30% auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 181, 75, 0.22), transparent 62%);
}

.hero-copy-compact {
  padding: 24px 22px 20px;
}

.hero-copy-compact h1 {
  font-size: clamp(2rem, 1.42rem + 1.7vw, 3.3rem);
  margin: 12px 0 12px;
  max-width: 10ch;
}

.hero-copy-compact .lead {
  margin: 0;
  max-width: 58ch;
}

.hero-copy-compact .meta-text {
  margin-top: 10px;
  font-size: 0.98rem;
}

.compact-tags {
  margin-top: 14px;
}

.hero-showcase {
  display: grid;
  gap: 16px;
}

.showcase-banner {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,174,63,0.18), rgba(255,255,255,0.03));
  border: 1px solid rgba(255,203,115,0.24);
  box-shadow: 0 20px 42px rgba(0, 0, 0, 0.34);
  min-height: 248px;
}

.showcase-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,113,34,0.16), transparent 26%, transparent 76%, rgba(0,0,0,0.28));
  pointer-events: none;
}

.showcase-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.showcase-badge {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 9px 13px;
  border-radius: 999px;
  background: rgba(18,10,4,0.72);
  border: 1px solid rgba(255,205,120,0.22);
  font-size: 0.86rem;
  font-weight: 800;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.showcase-tile {
  position: relative;
  overflow: hidden;
  min-height: 126px;
  padding: 16px;
  border-radius: 22px;
  border: 1px solid rgba(255,205,120,0.26);
  box-shadow: 0 18px 34px rgba(0,0,0,0.28);
}

.showcase-tile::before {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  top: -42px;
  right: -26px;
  background: radial-gradient(circle, rgba(255,219,144,0.42), rgba(255,219,144,0) 68%);
}

.showcase-tile::after {
  content: "";
  position: absolute;
  inset: auto -18px -22px auto;
  width: 120px;
  height: 120px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.01));
  transform: rotate(18deg);
}

.showcase-tile strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.02rem;
}

.showcase-tile p {
  margin: 0;
  line-height: 1.6;
  color: rgba(255,255,255,0.86);
}

.showcase-tile.warm {
  background: linear-gradient(135deg, rgba(132, 18, 8, 0.98), rgba(233, 67, 18, 0.96) 52%, rgba(255, 176, 49, 0.94));
}

.showcase-tile.gold {
  background: linear-gradient(135deg, rgba(108, 33, 0, 0.98), rgba(204, 106, 10, 0.96) 56%, rgba(255, 213, 120, 0.94));
}

.showcase-tile.gold p {
  color: rgba(42,23,0,0.86);
}

.showcase-tile.gold strong {
  color: #261200;
}

.showcase-tile.cool {
  background: linear-gradient(135deg, rgba(66, 12, 8, 0.98), rgba(153, 31, 14, 0.96) 46%, rgba(255, 141, 33, 0.94));
}

.promo-section {
  padding-top: 8px;
}

.promo-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.promo-card {
  position: relative;
  overflow: hidden;
  min-height: 176px;
  padding: 22px;
  border-radius: 24px;
  border: 1px solid rgba(255,205,120,0.24);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 18px 34px rgba(0,0,0,0.3);
}

.promo-card::before {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  right: -56px;
  top: -70px;
  background: radial-gradient(circle, rgba(255,223,132,0.36), rgba(255,223,132,0) 70%);
}

.promo-card::after {
  content: "";
  position: absolute;
  inset: auto -30px -38px auto;
  width: 180px;
  height: 70px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  transform: rotate(-18deg);
}

.promo-card > * {
  position: relative;
  z-index: 1;
}

.promo-card h3 {
  font-size: 1.32rem;
  margin-bottom: 10px;
}

.promo-card p {
  margin: 0;
  color: rgba(255,255,255,0.86);
  line-height: 1.6;
}

.promo-card .button-ghost {
  background: rgba(17, 7, 2, 0.22);
  border-color: rgba(255,219,142,0.3);
  color: #fff6dc;
}

.promo-kicker {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(44,18,0,0.18);
  border: 1px solid rgba(255,223,142,0.28);
  color: #fff3cf;
  font-size: 0.82rem;
  font-weight: 800;
}

.promo-card-primary {
  background: linear-gradient(135deg, rgba(124, 16, 8, 0.98), rgba(225, 57, 17, 0.96) 56%, rgba(255, 178, 55, 0.94));
}

.promo-card-accent {
  background: linear-gradient(135deg, rgba(105, 28, 0, 0.98), rgba(198, 100, 8, 0.96) 54%, rgba(255, 206, 110, 0.94));
}

.promo-card-dark {
  background: linear-gradient(135deg, rgba(70, 14, 10, 0.98), rgba(127, 24, 13, 0.96) 52%, rgba(245, 124, 31, 0.94));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  color: #dbe5ff;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  font-size: 0.92rem;
  font-weight: 700;
}

h1, h2, h3 { margin: 0; letter-spacing: -0.04em; }
h1 { font-size: clamp(2.2rem, 1.5rem + 2.6vw, 4.25rem); line-height: 0.98; margin: 18px 0 18px; }
h2 { font-size: clamp(1.7rem, 1.22rem + 1.4vw, 2.6rem); margin-bottom: 14px; }
h3 { font-size: 1.18rem; margin-bottom: 8px; }

.gradient-text {
  background: linear-gradient(135deg, #ffffff 20%, #9ab9ff 55%, #ffd67a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-size: 1.08rem;
  line-height: 1.72;
  color: #d7e0fb;
}

.meta-text,
.section-copy,
.card p,
.list-panel li,
.timeline-item p,
.download-table td,
.footnote,
.accordion-panel,
.notice p {
  color: var(--muted);
  line-height: 1.72;
}

.hero-actions,
.dual-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.tag {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  font-weight: 700;
  color: #eaf0ff;
}

.hero-visual {
  padding: 20px;
  display: grid;
  gap: 18px;
}

.visual-card {
  overflow: hidden;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.08);
}

.visual-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.visual-subgrid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 16px;
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}
.section-head p { margin: 0; }

.grid-2,
.grid-3,
.grid-4,
.grid-5 {
  display: grid;
  gap: 18px;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }

.card,
.stat-card,
.list-panel,
.accordion-item,
.notice,
.feature-card,
.preview-card,
.legal-card,
.footer-card,
.step-card,
.quote-card,
.download-card,
.meta-card,
.hero-mini {
  background: linear-gradient(180deg, rgba(16, 26, 54, 0.92), rgba(10, 17, 37, 0.92));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.card,
.feature-card,
.legal-card,
.notice,
.preview-card,
.step-card,
.download-card,
.meta-card,
.hero-mini {
  padding: 24px;
}

.icon-badge {
  width: 50px;
  height: 50px;
  border-radius: 16px;
  display: inline-grid;
  place-items: center;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(93, 143, 255, 0.22), rgba(255, 181, 75, 0.18));
  border: 1px solid rgba(255,255,255,0.08);
  font-size: 22px;
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 16px;
}
.stat-card {
  padding: 22px;
}
.stat-value {
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}
.stat-label { color: var(--muted); }

.download-layout {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 18px;
}
.download-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}
.download-table tr + tr { border-top: 1px solid rgba(255,255,255,0.08); }
.download-table td {
  padding: 14px 0;
}
.download-table td:first-child {
  color: #dbe5ff;
  font-weight: 700;
  width: 42%;
}

.meta-stack {
  display: grid;
  gap: 16px;
}
.meta-card strong { display: block; margin-bottom: 8px; font-size: 1.02rem; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.step-index {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--blue), var(--gold));
  color: #0b1226;
  font-weight: 900;
  margin-bottom: 14px;
}

.accordion {
  display: grid;
  gap: 14px;
}
.accordion-button {
  width: 100%;
  background: transparent;
  border: 0;
  color: var(--text);
  text-align: left;
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  font-size: 1rem;
  font-weight: 750;
  cursor: pointer;
}
.accordion-button span:last-child {
  color: var(--gold);
  font-size: 1.4rem;
}
.accordion-panel {
  display: none;
  padding: 0 24px 22px;
}
.accordion-item.open .accordion-panel { display: block; }
.accordion-item.open .accordion-button span:last-child { transform: rotate(45deg); }

.preview-frame {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  background: #0a1020;
  aspect-ratio: 16 / 10;
}
.preview-frame.tall { aspect-ratio: 9 / 16; }
.preview-label {
  margin-top: 14px;
  font-weight: 800;
}

.notice {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}
.notice strong { display: block; margin-bottom: 6px; font-size: 1.04rem; }

.page-hero {
  padding-top: 40px;
}
.page-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 22px;
  align-items: stretch;
}
.page-art {
  min-height: 100%;
  padding: 22px;
  display: grid;
  align-content: center;
  gap: 18px;
  position: relative;
  overflow: hidden;
}
.page-art::before {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(93, 143, 255, 0.2), transparent 65%);
  top: -40px;
  right: -80px;
}

.hero-mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.hero-mini strong { display: block; margin-bottom: 8px; }

.list-panel {
  padding: 26px;
}
.list-panel ul {
  margin: 0;
  padding-left: 18px;
}
.list-panel li + li { margin-top: 12px; }

.legal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.legal-nav a {
  padding: 11px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: #dbe5ff;
  font-weight: 700;
}

.legal-section + .legal-section { margin-top: 18px; }
.legal-card h3 { margin-bottom: 12px; }
.legal-card ul { margin: 0; padding-left: 18px; color: var(--muted); }
.legal-card li + li { margin-top: 10px; }

.callout {
  padding: 24px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(93,143,255,0.18), rgba(255,181,75,0.16));
  border: 1px solid rgba(255,255,255,0.1);
}

.site-footer {
  padding: 28px 0 38px;
  border-top: 1px solid rgba(255,255,255,0.08);
  background: rgba(4, 9, 20, 0.78);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 0.85fr 0.95fr;
  gap: 18px;
}
.footer-card { padding: 24px; }
.footer-card ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer-card li { color: var(--muted); }
.footer-bottom {
  margin-top: 18px;
  color: #93a1c8;
  font-size: 0.95rem;
}

.utility-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hidden-mobile { display: inline-flex; }
.only-mobile { display: none; }

@media (max-width: 1120px) {
  .desktop-nav,
  .header-actions .button,
  .header-actions .button-secondary { display: none; }
  .menu-toggle { display: grid; }
  .hero-grid,
  .page-hero-grid,
  .download-layout,
  .footer-grid,
  .promo-strip { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats-bar { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .showcase-grid { grid-template-columns: 1fr; }
  .showcase-banner { min-height: 224px; }
}

@media (max-width: 760px) {
  section { padding: 58px 0; }
  .container { width: min(calc(100% - 24px), var(--max)); }
  .hero-copy,
  .page-art,
  .card,
  .feature-card,
  .legal-card,
  .notice,
  .preview-card,
  .step-card,
  .download-card,
  .meta-card,
  .hero-mini,
  .list-panel,
  .footer-card { padding: 20px; }
  .brand-logo { height: 34px; }
  .hero-visual { padding: 16px; }
  .visual-subgrid,
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-5,
  .hero-mini-grid,
  .steps,
  .stats-bar,
  .showcase-grid,
  .promo-strip { grid-template-columns: 1fr; }
  .utility-row { align-items: stretch; }
  /* 移动端只隐藏明确标记为 hidden-mobile 的元素，不要全局隐藏按钮 */
  .hidden-mobile { display: none !important; }

  /* 首屏/内容区按钮：放在版本标签下面，移动端上下排列、撑满宽度 */
  .hero-actions,
  .dual-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 24px;
  }

  .hero-actions .button,
  .hero-actions .button-secondary,
  .hero-actions .button-ghost,
  .dual-actions .button,
  .dual-actions .button-secondary,
  .dual-actions .button-ghost {
    display: inline-flex;
    width: 100%;
    min-height: 52px;
    justify-content: center;
    text-align: center;
  }

  /* 右侧移动菜单里的 Download APK 按钮 */
  .mobile-menu-actions .button,
  .mobile-menu-actions .button-secondary,
  .mobile-menu-actions .button-ghost {
    display: inline-flex;
    width: 100%;
    justify-content: center;
    text-align: center;
  }
  .only-mobile { display: inline-flex; }
  .lead { font-size: 1rem; }
  h1 { font-size: 2.1rem; }
  .hero-copy-compact { padding: 20px 18px 18px; }
  .showcase-banner { min-height: 188px; }
  .promo-card { min-height: auto; }
  .tag-list { gap: 8px; }
}


.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0 22px;
}
.trust-chip {
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  border-radius: 18px;
  padding: 14px 16px;
  display: grid;
  gap: 4px;
}
.trust-chip strong {
  font-size: 15px;
  letter-spacing: -0.02em;
}
.trust-label {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
@media (max-width: 920px) {
  .trust-grid { grid-template-columns: 1fr; }
}