*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: #f7f8fc;
  color: #1a1a2e;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  font-size: 16px;
}

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

a { color: #494fdf; text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.container.narrow { max-width: 820px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: #494fdf; color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.noscript-hint {
  background: #fff3cd; color: #856404; padding: 12px 20px;
  text-align: center; font-size: 14px; border-bottom: 1px solid #ffeeba;
}

.site-header { border-bottom: 1px solid #e8e8f0; background: #fff; }
.nav-inner { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; padding-top: 14px; padding-bottom: 14px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: #1a1a2e; }
.brand-mark { color: #494fdf; display: inline-flex; }
.site-nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.site-nav a { color: #6b7280; font-size: 15px; }
.nav-toggle { display: none; }

.section { padding: 48px 0; }
.section-alt { background: #f0f1f7; }
.section-head { margin-bottom: 28px; }
.section-head h2 { font-size: 26px; margin: 8px 0; }
.section-tag { color: #494fdf; letter-spacing: 2px; font-size: 12px; }

.hero { padding: 40px 0; border-bottom: 1px solid #e8e8f0; }
.hero h1 { font-size: 34px; margin: 12px 0; }
.hero-lead { color: #6b7280; font-size: 16px; }

.feature-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.plan-grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.device-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }

.image-gallery { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.gallery-item { margin: 0; }
.gallery-item img { border-radius: 12px; width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.gallery-item figcaption { margin-top: 8px; color: #6b7280; font-size: 14px; }

details { margin-bottom: 12px; }
summary { cursor: pointer; padding: 12px; background: #fff; border-radius: 8px; border: 1px solid #e8e8f0; }

.site-footer { border-top: 1px solid #e8e8f0; padding: 28px 0; color: #6b7280; font-size: 14px; background: #fff; }
.footer-grid { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; }

button { font-family: inherit; }

fieldset, input, select, textarea { font-family: inherit; font-size: inherit; }

html:not(.ncpw) body {
  filter: blur(10px);
  -webkit-filter: blur(10px);
}
body {
  transition: filter 0.5s ease, opacity 0.5s ease;
}