:root {
  --primary-700: #1E3A8A;
  --primary-600: #1D4ED8;
  --primary-500: #2F5DFF;
  --secondary-500: #14B8A6;
  --secondary-600: #0F9F92;
  --accent-500: #F59E0B;
  --accent-600: #D97706;
  --success-500: #22C55E;
  --warning-500: #F97316;
  --danger-500: #EF4444;
  --info-500: #38BDF8;
  --text-1: #0F172A;
  --text-2: #334155;
  --muted: #64748B;
  --border: #E2E8F0;
  /* --bg: #F6F8FC; */
  --bg: #FFFFFF;
  --card: #FFFFFF;
  --shadow-lg: 0 18px 42px rgba(15, 23, 42, 0.1);
  --shadow-md: 0 10px 26px rgba(15, 23, 42, 0.08);
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-1);
  background: var(--bg);
}

html {
  scroll-padding-top: 96px;
}

a { text-decoration: none; color: inherit; }

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.container.container-narrow {
  width: min(1100px, 92vw);
}

.section {
  padding: 72px 0;
}

header {
  background: radial-gradient(circle at top, rgba(47, 93, 255, 0.16), rgba(20, 184, 166, 0.08) 48%, rgba(246, 248, 252, 1) 100%);
  border-bottom: 1px solid var(--border);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.78);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .topbar {
    background: #fff;
  }
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 10px;
  gap: 16px;
}

.topbar .nav {
  padding: 18px 0 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--primary-500), var(--secondary-500));
  box-shadow: var(--shadow-md);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  color: var(--text-2);
}

.nav-links {
  display: flex;
  gap: 18px;
  color: var(--text-2);
  font-size: 14px;
}

.btn {
  border: none;
  border-radius: 12px;
  padding: 10px 18px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn.primary { background: var(--primary-500); color: #fff; }
.btn.ghost { background: #fff; border: 1px solid var(--border); color: var(--text-2); }

.hero {
  display: grid;
  gap: 40px;
  align-items: center;
  padding: 40px 0 60px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.hero h1 {
  font-size: clamp(32px, 3.2vw, 44px);
  margin: 0 0 16px;
  line-height: 1.15;
}

.hero p {
  margin: 0;
  color: var(--text-2);
  line-height: 1.8;
  font-size: 16px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.hero-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  display: grid;
  gap: 16px;
}

.hero-card .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  color: var(--muted);
}

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

.pill {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-2);
}

.grid {
  display: grid;
  gap: 18px;
}

.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.card {
  background: var(--card);
  border-radius: var(--radius-md);
  padding: 22px;
  border: 0.5px solid var(--border);
  /* box-shadow: var(--shadow-md); */
}

.section-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}

.section-title span {
  color: var(--secondary-600);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.section-title h2 {
  margin: 0;
  font-size: 26px;
}

.section-title p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid transparent;
  font-weight: 600;
}

.tag.primary { background: rgba(47, 93, 255, 0.12); color: var(--primary-600); }
.tag.secondary { background: rgba(20, 184, 166, 0.12); color: var(--secondary-600); }
.tag.accent { background: rgba(245, 158, 11, 0.16); color: var(--accent-600); }

.stat {
  display: grid;
  gap: 8px;
}

.stat .value {
  font-size: 24px;
  font-weight: 700;
}

.stat .label {
  color: var(--muted);
  font-size: 13px;
}

.device {
  padding: 18px;
  border-radius: 18px;
  background: linear-gradient(140deg, rgba(47, 93, 255, 0.12), rgba(20, 184, 166, 0.08));
  border: 1px solid rgba(47, 93, 255, 0.2);
}

.device h3 { margin: 0; }
.device p { margin: 8px 0 0; color: var(--muted); }

.qr-block {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.8);
}

.qr-block img {
  width: 88px;
  height: 88px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  object-fit: cover;
}

.qr-block .qr-text {
  display: grid;
  gap: 4px;
  color: var(--text-2);
}

.qr-block .qr-text small {
  color: var(--muted);
}

.list {
  display: grid;
  gap: 14px;
}

.list-features .list-item,
.list-bullets .list-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-top: 8px;
  background: var(--primary-500);
}

.quote {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: 16px;
}

.quote p { margin: 0; color: var(--text-2); line-height: 1.8; }

.cta {
  background: linear-gradient(120deg, rgba(47, 93, 255, 0.15), rgba(20, 184, 166, 0.18));
  border: 1px solid rgba(47, 93, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.footer-title { font-weight: 600; margin-bottom: 8px; color: var(--text-1); }

main {
  padding: 56px 0 80px;
}

.layout {
  display: grid;
  gap: 24px;
}

.layout > article,
.layout > section,
.layout > aside {
  min-width: 0;
}

.layout.layout-list {
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
}

.layout.layout-detail {
  grid-template-columns: minmax(0, 2.3fr) minmax(260px, 1fr);
}

.list-articles {
  display: grid;
  gap: 18px;
}

.list-articles .list-item {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #fff;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.list-articles .list-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.list-articles .list-item h3 {
  margin: 0;
  font-size: 18px;
}

.list-articles .list-item p {
  margin: 0;
  color: var(--text-2);
  line-height: 1.7;
}

.list-articles .info {
  display: flex;
  gap: 14px;
  color: var(--muted);
  font-size: 12px;
  flex-wrap: wrap;
}

.hero.compact {
  padding: 36px 0 48px;
  gap: 18px;
}

.hero.compact h1 { margin: 0; font-size: clamp(30px, 3vw, 40px); }
.hero.compact p { max-width: 640px; }

.meta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.search {
  display: flex;
  gap: 10px;
}

.search input {
  flex: 1;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 10px 14px;
  font-size: 14px;
}

.filter-list {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.filter-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
  color: var(--text-2);
}

.subscribe {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.subscribe input {
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 10px 14px;
  font-size: 14px;
}

.breadcrumb {
  color: var(--muted);
  font-size: 13px;
}

.meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}

.article h2 {
  margin-top: 28px;
}

.article p {
  color: var(--text-2);
  line-height: 1.9;
}

.article blockquote {
  margin: 24px 0;
  padding: 18px 22px;
  background: rgba(47, 93, 255, 0.08);
  border-left: 4px solid var(--primary-500);
  border-radius: 12px;
  color: var(--text-2);
}

.highlight {
  display: grid;
  gap: 10px;
  padding: 16px;
  border-radius: 14px;
  background: rgba(20, 184, 166, 0.1);
  border: 1px solid rgba(20, 184, 166, 0.2);
  margin: 24px 0;
}

.side-card {
  display: grid;
  gap: 16px;
}

.side-item {
  display: grid;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border);
}

footer {
  padding: 48px 0 32px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
  background: #fff;
}

@media (max-width: 1024px) {
  .layout,
  .layout.layout-list,
  .layout.layout-detail {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .layout,
  .layout.layout-list,
  .layout.layout-detail {
    grid-template-columns: 1fr;
  }

  .layout > aside {
    order: 2;
  }
}

@media (max-width: 720px) {
  .nav {
    flex-wrap: wrap;
    gap: 12px;
    padding: 18px 0 14px;
  }

  .brand {
    font-size: 16px;
  }

  .logo {
    width: 34px;
    height: 34px;
    border-radius: 12px;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    font-size: 13px;
    padding: 12px 0;
    border-top: 1px solid var(--border);
  }

  .nav-links.is-open {
    display: flex;
  }

  .btn {
    padding: 8px 14px;
    border-radius: 10px;
  }

  .nav .btn {
    width: 100%;
    justify-content: center;
  }

  .hero {
    padding: 28px 0 40px;
    gap: 20px;
  }

  .hero.compact {
    padding: 24px 0 32px;
  }

  .card {
    padding: 18px;
  }

  .qr-block {
    flex-direction: column;
    align-items: flex-start;
  }

  .qr-block img {
    width: 120px;
    height: 120px;
  }

  .cta { flex-direction: column; align-items: flex-start; }
}