:root {
  --bg: #f5f8ff;
  --surface: #ffffff;
  --text: #14213d;
  --muted: #5f6f89;
  --brand: #287dff;
  --brand-2: #1d5fd6;
  --line: #dfe8f6;
  --shadow: 0 18px 50px rgba(25, 72, 145, 0.12);
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(1160px, calc(100% - 36px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(223,232,246,.9);
}
.nav { min-height: 76px; display: flex; align-items: center; gap: 28px; }
.logo img { width: 220px; height: auto; }
.nav-links { margin-left: auto; display: flex; gap: 22px; color: #3f506c; font-weight: 600; }
.nav-cta, .btn-primary, .btn-secondary {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px; padding: 13px 22px; font-weight: 800;
}
.nav-cta, .btn-primary { color: #fff; background: linear-gradient(135deg, var(--brand), #55a5ff); box-shadow: 0 12px 24px rgba(40,125,255,.22); }
.btn-secondary { background: #fff; border: 1px solid var(--line); }
.hero { padding: 74px 0 48px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 56px; align-items: center; }
.eyebrow { font-size: 14px; font-weight: 800; color: var(--brand); letter-spacing: .08em; text-transform: uppercase; }
h1 { font-size: clamp(44px, 7vw, 78px); line-height: 1.03; margin: 12px 0 20px; letter-spacing: -.04em; }
.hero p { font-size: 19px; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 28px 0 24px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 14px 24px; color: #566986; font-size: 14px; }
.hero-card { background: #fff; padding: 12px; border-radius: 30px; box-shadow: var(--shadow); transform: rotate(1.3deg); }
.hero-card img { border-radius: 22px; aspect-ratio: 16/10; object-fit: cover; }
.section { padding: 72px 0; }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head h2 { font-size: clamp(30px, 4vw, 48px); line-height: 1.15; margin: 8px 0 12px; }
.section-head p { color: var(--muted); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px; box-shadow: 0 10px 30px rgba(33,77,144,.06);
}
.card h3 { margin: 10px 0 8px; font-size: 21px; }
.card p { color: var(--muted); margin: 0; }
.icon { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; background: #eaf3ff; color: var(--brand); font-weight: 900; }
.platforms { display: grid; grid-template-columns: repeat(5,1fr); gap: 16px; }
.platform { text-align: center; padding: 24px 14px; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
.slider { position: relative; overflow: hidden; border-radius: 28px; box-shadow: var(--shadow); background: #0f1e37; }
.slides { display: flex; transition: transform .55s ease; }
.slide { min-width: 100%; position: relative; }
.slide img { width: 100%; aspect-ratio: 15/7; object-fit: cover; }
.slide-cap { position: absolute; left: 34px; bottom: 28px; background: rgba(10,24,49,.76); color: #fff; padding: 14px 18px; border-radius: 16px; backdrop-filter: blur(8px); }
.article-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.article-card { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 20px; }
.article-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.article-card .copy { padding: 20px; }
.article-card h3 { margin: 0 0 8px; line-height: 1.35; }
.article-card p { color: var(--muted); margin: 0; font-size: 14px; }
.badge { display: inline-flex; border-radius: 999px; background: #eaf3ff; color: #1f6de1; padding: 5px 10px; font-size: 12px; font-weight: 800; }
.footer { margin-top: 70px; background: #0f1e37; color: #dce7f7; padding: 54px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 40px; }
.footer img { width: 210px; filter: brightness(0) invert(1); }
.footer p, .footer a { color: #aebdd1; }
.article-hero { padding: 60px 0 28px; }
.article-hero h1 { font-size: clamp(36px, 5vw, 58px); max-width: 980px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 16px; color: var(--muted); font-size: 14px; }
.article-cover { margin: 24px auto 0; border-radius: 28px; overflow: hidden; box-shadow: var(--shadow); }
.article-cover img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 34px; align-items: start; }
.prose { background: #fff; border: 1px solid var(--line); border-radius: 24px; padding: 34px; }
.prose h2 { margin-top: 38px; line-height: 1.3; font-size: 27px; }
.prose h2:first-child { margin-top: 0; }
.prose p { color: #34445f; }
.note { padding: 18px 20px; border-left: 4px solid var(--brand); background: #f0f6ff; border-radius: 12px; }
.sidebar { position: sticky; top: 102px; display: grid; gap: 18px; }
.sidebar .card { padding: 20px; }
.sidebar h3 { margin-top: 0; }
.related-list { display: grid; gap: 12px; }
.related-list a { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.download-panel { background: linear-gradient(135deg,#173d83,#287dff); color:#fff; border-radius: 26px; padding: 34px; }
.download-panel p { color: #dbe9ff; }
.faq { display: grid; gap: 14px; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; }
.faq summary { cursor: pointer; font-weight: 800; }
@media (max-width: 900px) {
  .hero-grid, .article-layout, .footer-grid { grid-template-columns: 1fr; }
  .grid-3, .article-grid { grid-template-columns: 1fr 1fr; }
  .platforms { grid-template-columns: repeat(2,1fr); }
  .nav-links { display: none; }
  .sidebar { position: static; }
}
@media (max-width: 620px) {
  .grid-3, .article-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 44px; }
  .nav-cta { display: none; }
  .prose { padding: 24px; }
}

.listing-hero { padding: 58px 0 30px; }
.listing-hero h1 { font-size: clamp(38px,5vw,58px); margin: 8px 0 14px; }
.listing-hero p { max-width: 820px; color: var(--muted); }
.category-nav { display:flex; flex-wrap:wrap; gap:10px; margin-top:22px; }
.category-nav a { padding:9px 14px; background:#fff; border:1px solid var(--line); border-radius:999px; font-size:14px; font-weight:700; }
.listing-toolbar { display:flex; align-items:center; justify-content:space-between; gap:16px; margin-bottom:24px; }
.listing-count { color:var(--muted); font-size:14px; }
.listing-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.listing-card { background:#fff; border:1px solid var(--line); border-radius:20px; overflow:hidden; }
.listing-card img { width:100%; aspect-ratio:16/9; object-fit:cover; }
.listing-card .copy { padding:20px; }
.listing-card h2 { font-size:21px; line-height:1.4; margin:10px 0; }
.listing-card p { color:var(--muted); margin:0; font-size:14px; }
.listing-card .meta-row { display:flex; justify-content:space-between; gap:10px; color:var(--muted); font-size:12px; margin-top:14px; }
@media (max-width:900px){.listing-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:620px){.listing-grid{grid-template-columns:1fr;}}