:root {
    --cyan: #4dd9e8;
    --blue: #3b82f6;
    --indigo: #667eea;
    --dark-bg: #0b0e1a;
    --dark-card: #111528;
    --text-primary: #eef0ff;
    --text-secondary: #a8adc6;
    --text-muted: #6b7194;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'DM Sans', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--dark-bg);
    overflow-x: hidden;
}

.site-nav {
    background: rgba(11, 14, 26, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 16px 40px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(77, 217, 232, 0.08);
}
.nav-inner { max-width: 1400px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-logo img { height: 36px; border-radius: 10px; }
.nav-logo span { font-family: 'Outfit', sans-serif; font-weight: 700; color: white; font-size: 1.15rem; }
.nav-links { list-style: none; display: flex; gap: 36px; margin: 0; padding: 0; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-size: 0.92rem; font-weight: 500; }
.nav-links a:hover, .nav-links a.nav-active { color: var(--cyan); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text-secondary); border-radius: 2px; transition: all 0.3s; }
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
.nav-overlay { display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.5); z-index: 998; }
.nav-overlay.open { display: block; }

.blog-container { max-width: 760px; margin: 0 auto; padding: 120px 24px 80px; position: relative; z-index: 2; }
.blog-breadcrumb { padding: 0 0 16px; font-size: 0.85rem; color: var(--text-muted); }
.blog-breadcrumb a { color: var(--text-muted); text-decoration: none; }
.blog-breadcrumb a:hover { color: var(--cyan); }
.blog-breadcrumb span { margin: 0 8px; }
.blog-meta { display: flex; align-items: center; gap: 16px; margin-bottom: 32px; flex-wrap: wrap; }
.blog-date { font-size: 0.9rem; color: var(--text-muted); }
.blog-tag { display: inline-block; background: rgba(77, 217, 232, 0.08); border: 1px solid rgba(77, 217, 232, 0.2); border-radius: 100px; padding: 4px 14px; font-size: 0.78rem; color: var(--cyan); font-weight: 500; }
.blog-title { font-family: 'Outfit', sans-serif; font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 800; line-height: 1.15; color: white; margin-bottom: 16px; }
.blog-subtitle { font-size: 1.2rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 48px; }
.blog-hero-image { width: 100%; height: auto; border-radius: 12px; margin: 1.5rem 0 2rem; display: block; }

.blog-body h2 { font-family: 'Outfit', sans-serif; font-size: 1.55rem; font-weight: 700; color: white; margin: 56px 0 16px; line-height: 1.3; }
.blog-body h2 .num { background: linear-gradient(135deg, var(--cyan), var(--blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-right: 8px; }
.blog-body h3 { font-family: 'Outfit', sans-serif; font-size: 1.2rem; color: white; margin: 32px 0 10px; }
.blog-body p { font-size: 1.08rem; color: var(--text-secondary); line-height: 1.85; margin-bottom: 20px; }
.blog-body strong { color: var(--text-primary); font-weight: 600; }
.blog-body a { color: var(--cyan); text-decoration: none; border-bottom: 1px solid rgba(77, 217, 232, 0.3); }
.blog-body a:hover { border-color: var(--cyan); }
.blog-body ul { margin: 16px 0 20px 24px; }
.blog-body li { font-size: 1.08rem; color: var(--text-secondary); line-height: 1.85; margin-bottom: 8px; }
.info-box, .app-cta { margin: 24px 0; padding: 20px 24px; background: var(--dark-card); border-radius: 12px; border: 1px solid rgba(77, 217, 232, 0.08); }
.info-box p, .app-cta p { font-size: 0.98rem; margin-bottom: 8px; }
.info-box p:last-child, .app-cta p:last-child { margin-bottom: 0; }
.info-box strong, .app-cta strong { color: var(--cyan); }
.app-links { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 12px; }
.app-links a { color: var(--cyan); font-size: 0.92rem; text-decoration: none; font-weight: 600; border-bottom: none; }

.blog-closing { margin-top: 56px; padding-top: 40px; border-top: 1px solid rgba(77, 217, 232, 0.08); }
.blog-closing p { font-size: 1.1rem; line-height: 1.85; color: var(--text-secondary); margin-bottom: 20px; }
.blog-closing .highlight-line { font-family: 'Outfit', sans-serif; font-size: 1.3rem; font-weight: 700; background: linear-gradient(135deg, var(--cyan), var(--blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-top: 32px; }

.author-card { margin-top: 64px; padding: 32px; background: var(--dark-card); border-radius: 12px; border: 1px solid rgba(77, 217, 232, 0.08); display: flex; align-items: center; gap: 24px; }
.author-card img { width: 64px; height: 64px; border-radius: 50%; border: 2px solid rgba(77, 217, 232, 0.2); }
.author-info h3 { font-family: 'Outfit', sans-serif; font-size: 1.1rem; font-weight: 600; color: white; margin-bottom: 4px; }
.author-info p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }
.author-info a { color: var(--cyan); text-decoration: none; font-size: 0.85rem; }
.back-to-blog { display: inline-flex; align-items: center; gap: 8px; margin-top: 48px; color: var(--cyan); text-decoration: none; font-weight: 500; font-size: 0.95rem; }

footer { text-align: center; padding: 60px 20px 40px; border-top: 1px solid rgba(77, 217, 232, 0.06); background: rgba(17, 21, 40, 0.4); }
.footer-brand { font-family: 'Outfit', sans-serif; font-size: 1.4rem; font-weight: 700; color: white; margin-bottom: 16px; }
.footer-content p { font-size: 0.92rem; margin-bottom: 6px; color: var(--text-muted); }
.footer-mascot { width: 80px; height: 80px; margin: 0 auto 16px; display: block; opacity: 0.7; }
.footer-links { margin-top: 24px; display: flex; justify-content: center; gap: 32px; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.88rem; font-weight: 500; }
.footer-links a:hover { color: var(--cyan); }

@media (max-width: 768px) {
    .site-nav { padding: 12px 20px; }
    .nav-logo span { display: none; }
    .nav-toggle { display: flex; }
    .nav-links { position: fixed; top: 0; right: 0; width: 240px; height: 100vh; background: rgba(11, 14, 26, 0.97); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); flex-direction: column; padding: 80px 32px 40px; gap: 0; transform: translateX(100%); transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1); border-left: 1px solid rgba(77, 217, 232, 0.08); z-index: 999; }
    .nav-links.open { transform: translateX(0); }
    .nav-links li { border-bottom: 1px solid rgba(255, 255, 255, 0.04); }
    .nav-links a { display: block; padding: 16px 0; font-size: 1.05rem; }
    .blog-container { padding-top: 80px; }
    .blog-body h2 { font-size: 1.3rem; margin-top: 40px; }
    .blog-body p, .blog-body li { font-size: 1rem; }
    .author-card { flex-direction: column; text-align: center; }
    .footer-links { flex-direction: column; gap: 16px; }
}