```css
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --brand-primary: #0b1a33;
    --brand-accent: #4fc3f7;
    --brand-accent2: #29b6f6;
    --gradient-hero: linear-gradient(135deg, #0b1a33 0%, #1a3a5c 60%, #0d2b4e 100%);
    --glass-bg: rgba(255,255,255,0.06);
    --glass-border: rgba(255,255,255,0.12);
    --shadow-card: 0 12px 30px rgba(0,0,0,0.3);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --text-light: #e8edf3;
    --text-muted: #b0c4d9;
    --bg-dark: #081422;
    --bg-card: rgba(20, 40, 70, 0.65);
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
}
body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0f1f2e; }
::-webkit-scrollbar-thumb { background: #2a4b6e; border-radius: 8px; }
@media (prefers-color-scheme: dark) {
    :root { --bg-dark: #050f1a; --bg-card: rgba(12, 26, 45, 0.8); }
}
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.glass-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.5); }
.btn-primary {
    background: var(--brand-accent);
    color: #0b1a33;
    border: none;
    padding: 14px 34px;
    border-radius: 60px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(79, 195, 247, 0.3);
}
.btn-primary:hover { background: #6dd0fa; transform: scale(1.02); box-shadow: 0 8px 24px rgba(79, 195, 247, 0.5); }
.section-title {
    font-size: 2.4rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, #e0f0ff, #9bc9f0);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.75rem;
}
.section-sub { color: var(--text-muted); font-size: 1.1rem; max-width: 720px; margin-bottom: 3rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.8rem; }
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(8, 20, 34, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 0 24px;
    transition: background 0.3s;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; max-width: 1280px; margin: 0 auto; }
.logo svg { height: 40px; width: auto; display: block; }
.nav-menu { display: flex; gap: 2rem; list-style: none; }
.nav-menu a { color: #d0dcec; text-decoration: none; font-weight: 500; font-size: 0.98rem; transition: color 0.2s; position: relative; }
.nav-menu a:hover, .nav-menu a.active { color: var(--brand-accent); }
.nav-menu a.active::after { content: ''; position: absolute; bottom: -6px; left: 0; width: 100%; height: 2px; background: var(--brand-accent); border-radius: 4px; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 8px; }
.hamburger span { width: 28px; height: 2.5px; background: #d0dcec; border-radius: 4px; transition: 0.3s; }
.dark-toggle { background: none; border: 1px solid rgba(255,255,255,0.2); color: #d0dcec; border-radius: 30px; padding: 6px 16px; font-size: 0.9rem; cursor: pointer; }
@media (max-width: 1024px) {
    .nav-menu { display: none; position: absolute; top: 72px; left: 0; width: 100%; background: rgba(8,20,34,0.98); flex-direction: column; padding: 2rem; gap: 1.5rem; border-bottom: 1px solid rgba(255,255,255,0.1); }
    .nav-menu.open { display: flex; }
    .hamburger { display: flex; }
}
.hero {
    background: var(--gradient-hero);
    padding: 5rem 0 7rem;
    position: relative;
    overflow: hidden;
}
.hero::after { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 20% 50%, rgba(79,195,247,0.12), transparent 60%); pointer-events: none; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.hero h1 { font-size: 3.2rem; font-weight: 700; line-height: 1.2; background: linear-gradient(to right, #fff, #b3e0ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { font-size: 1.2rem; color: var(--text-muted); margin: 1.5rem 0 2rem; max-width: 520px; }
.hero-badge { display: inline-block; background: rgba(79,195,247,0.15); border: 1px solid rgba(79,195,247,0.3); border-radius: 60px; padding: 0.4rem 1.2rem; font-size: 0.9rem; color: #b3e0ff; margin-bottom: 1.5rem; }
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-visual svg { width: 100%; max-width: 480px; height: auto; filter: drop-shadow(0 10px 30px rgba(0,40,80,0.6)); }
@media (max-width: 800px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero h1 { font-size: 2.4rem; }
    .hero p { margin-left: auto; margin-right: auto; }
}
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 3rem; margin-top: 3rem; }
.stat-item { text-align: center; }
.stat-number { font-size: 2.8rem; font-weight: 700; color: var(--brand-accent); }
.stat-label { color: var(--text-muted); font-size: 1rem; }
.section { padding: 5rem 0; }
.bg-card-alt { background: rgba(12, 28, 48, 0.6); border-radius: var(--radius-lg); padding: 2.5rem; margin: 1rem 0; }
.faq-item { border-bottom: 1px solid rgba(255,255,255,0.08); padding: 1.2rem 0; }
.faq-question { display: flex; justify-content: space-between; font-weight: 500; cursor: pointer; font-size: 1.1rem; }
.faq-question span { color: var(--brand-accent); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s; color: #cbdae9; padding-left: 1.2rem; }
.faq-answer.open { max-height: 400px; padding-top: 0.8rem; }
.article-card { background: var(--bg-card); border-radius: var(--radius-md); padding: 1.8rem; border: 1px solid rgba(255,255,255,0.05); transition: 0.3s; }
.article-card h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.article-card .meta { color: var(--text-muted); font-size: 0.85rem; }
.read-more { color: var(--brand-accent); text-decoration: none; font-weight: 500; display: inline-block; margin-top: 0.8rem; }
.site-footer { background: #050f1a; border-top: 1px solid rgba(255,255,255,0.05); padding: 3rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); margin-top: 2.5rem; padding-top: 1.8rem; display: flex; flex-wrap: wrap; justify-content: space-between; color: var(--text-muted); font-size: 0.9rem; }
.footer-links a { color: #b0c4d9; text-decoration: none; margin-right: 1.5rem; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-bottom { flex-direction: column; gap: 1rem; } }
.back-top { position: fixed; bottom: 30px; right: 30px; background: var(--brand-accent); color: #0b1a33; width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 4px 20px rgba(79,195,247,0.3); transition: 0.3s; opacity: 0; visibility: hidden; border: none; font-size: 1.6rem; }
.back-top.show { opacity: 1; visibility: visible; }
.carousel { overflow: hidden; position: relative; border-radius: var(--radius-md); }
.carousel-track { display: flex; transition: transform 0.6s ease; }
.carousel-slide { min-width: 100%; padding: 2rem; background: var(--bg-card); border-radius: var(--radius-md); }
.carousel-nav { display: flex; justify-content: center; gap: 0.8rem; margin-top: 1.5rem; }
.carousel-dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.2); border: none; cursor: pointer; }
.carousel-dot.active { background: var(--brand-accent); }
```