/* Blueprint Aurora theme: deep blue-violet gradients, neon teal accents, floating panel cards, rounded pill nav, glassy hero, and animated SVGs. */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@500;700&display=swap');

:root {
  --bg-main: #f6f8ff;
  --bg-hero: linear-gradient(135deg, #5a6cff 0%, #00eaff 100%);
  --accent: #00eaff;
  --accent2: #5a6cff;
  --text-main: #232946;
  --text-light: #fff;
  --card-bg: rgba(255,255,255,0.92);
  --card-shadow: 0 4px 24px 0 rgba(90,108,255,0.12);
  --nav-bg: rgba(255,255,255,0.85);
  --nav-active: #00eaff;
  --nav-inactive: #b9c6e4;
  --footer-bg: #232946;
  --footer-text: #e4eaff;
}

body {
  margin: 0;
  font-family: 'Montserrat', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  letter-spacing: 0.01em;
}

.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 64px;
  box-shadow: 0 2px 8px 0 rgba(90,108,255,0.06);
  border-bottom: 1px solid #e4eaff;
  padding: 0 32px;
}
.nav-inner {
  display: flex;
  align-items: center;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: 32px;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-list {
  display: flex;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--nav-inactive);
  text-decoration: none;
  padding: 8px 20px;
  border-radius: 999px;
  transition: background .2s, color .2s;
}
.nav-link.active {
  background: var(--nav-active);
  color: #fff;
  box-shadow: 0 2px 16px 0 #00eaff33;
}

.hero {
  background: var(--bg-hero);
  color: var(--text-light);
  padding: 64px 0 40px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero-main {
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 18px;
}
.hero-sub {
  font-size: 1.3rem;
  font-weight: 500;
  margin-bottom: 32px;
  opacity: 0.93;
}
.hero-download {
  font-size: 1.15rem;
  font-weight: 700;
  background: #fff;
  color: var(--accent2);
  border: none;
  border-radius: 999px;
  padding: 14px 38px;
  box-shadow: 0 4px 18px 0 #00eaff33;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.hero-download:hover {
  background: var(--accent2);
  color: #fff;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  margin: 48px auto 0 auto;
  max-width: 1200px;
}
.feature-card {
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
  border-radius: 18px;
  padding: 32px 24px 24px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 230px;
  transition: box-shadow .2s, transform .2s;
}
.feature-card:hover {
  box-shadow: 0 8px 32px 0 #00eaff22;
  transform: translateY(-4px) scale(1.025);
}
.feature-icon {
  margin-bottom: 20px;
}
.feature-title {
  font-size: 1.18rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-desc {
  font-size: 1rem;
  color: #3e4a6b;
  opacity: 0.93;
}

.platforms {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin: 56px auto 0 auto;
  max-width: 900px;
}
.platform-card {
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: var(--card-shadow);
  padding: 30px 28px 24px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 180px;
  min-height: 160px;
}
.platform-icon {
  margin-bottom: 16px;
}
.platform-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.platform-desc {
  font-size: 0.98rem;
  color: #3e4a6b;
  opacity: 0.93;
  text-align: center;
}
.platform-download {
  margin-top: 16px;
  font-size: 1rem;
  font-weight: 700;
  background: var(--accent2);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 10px 28px;
  cursor: pointer;
  transition: background .2s;
}
.platform-download:hover {
  background: var(--accent);
}

.section {
  margin: 64px auto 0 auto;
  max-width: 1200px;
  padding: 0 24px;
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--accent2);
}
.section-content {
  font-size: 1.08rem;
  color: #2e3652;
  line-height: 1.8;
}

.stats-bar {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin: 54px 0 0 0;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.stat-num {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--accent2);
}
.stat-label {
  font-size: 1rem;
  color: #3e4a6b;
}

.cmp-table {
  width: 100%;
  border-collapse: collapse;
  margin: 36px 0 0 0;
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}
.cmp-table th, .cmp-table td {
  padding: 14px 18px;
  text-align: left;
}
.cmp-table th {
  background: var(--accent2);
  color: #fff;
  font-weight: 700;
}
.cmp-table tr:nth-child(even) {
  background: #f2f6ff;
}
.cmp-table tr:nth-child(odd) {
  background: #e4eaff;
}

.faq-list {
  margin: 48px 0 0 0;
  max-width: 900px;
}
.faq-item {
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
  border-radius: 10px;
  margin-bottom: 18px;
  padding: 22px 28px;
}
.faq-q {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--accent2);
  margin-bottom: 8px;
}
.faq-a {
  font-size: 1rem;
  color: #2e3652;
  opacity: 0.97;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin: 48px 0 0 0;
}
.review-card {
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
  border-radius: 12px;
  padding: 22px 18px 18px 18px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.review-header {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}
.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent2);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 14px;
}
.review-info {
  display: flex;
  flex-direction: column;
}
.review-name {
  font-weight: 700;
  font-size: 1.02rem;
}
.review-stars {
  color: #ffb400;
  font-size: 1.08rem;
}
.review-text {
  font-size: 0.98rem;
  color: #3e4a6b;
  opacity: 0.93;
}

.site-footer {
  margin-top: 72px;
  background: var(--footer-bg);
  color: var(--footer-text);
  text-align: center;
  padding: 32px 0 18px 0;
  font-size: 1rem;
  border-radius: 24px 24px 0 0;
}
.footer-brand {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 6px;
}
.footer-security {
  color: #00eaff;
  font-weight: 700;
  margin-bottom: 8px;
}
.footer-note {
  font-size: 0.98rem;
  color: #b9c6e4;
}

@media (max-width: 700px) {
  .feature-grid, .reviews-grid { grid-template-columns: 1fr; }
  .platforms { flex-direction: column; gap: 24px; }
  .stats-bar { flex-direction: column; gap: 24px; }
  .section-title { font-size: 1.4rem; }
  .topnav { height: 54px; }
}