:root {
    --primary: #0070f3;
    --primary-light: rgba(0, 112, 243, 0.1);
    --secondary: #00dfd8;
    --bg-main: #f4f7f6;
    --bg-card: #ffffff;
    --text-dark: #111111;
    --text-muted: #666666;
    --border: #eaeaea;
    --shadow-soft: 0 4px 14px 0 rgba(0,118,255,0.1);
    --shadow-hover: 0 6px 20px rgba(0,118,255,0.15);
    --radius-lg: 16px;
    --radius-md: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
body { background-color: var(--bg-main); color: var(--text-dark); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.2s ease; }

/* Tech Nav */
.nav { background: rgba(255,255,255,0.8); backdrop-filter: saturate(180%) blur(10px); border-bottom: 1px solid var(--border); padding: 15px 5%; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100; }
.nav-brand { font-size: 22px; font-weight: 700; color: var(--primary); letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--text-muted); }
.nav-links a.active, .nav-links a:hover { color: var(--text-dark); }
.nav-btn { background: var(--primary); color: white !important; padding: 8px 20px; border-radius: 20px; box-shadow: 0 4px 14px 0 rgba(0,118,255,0.39); }
.nav-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,118,255,0.23); background: rgba(0,118,255,0.9); }

/* Hero Tech */
.hero { text-align: center; padding: 100px 20px 60px; max-width: 900px; margin: 0 auto; position: relative; }
.hero-tag { display: inline-block; padding: 5px 15px; background: var(--primary-light); color: var(--primary); border-radius: 20px; font-size: 12px; font-weight: 600; margin-bottom: 20px; letter-spacing: 1px; }
.hero h1 { font-size: 52px; font-weight: 800; letter-spacing: -1.5px; margin-bottom: 20px; line-height: 1.1; }
.hero h1 span { background: linear-gradient(90deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 18px; color: var(--text-muted); margin-bottom: 40px; }
.btn-group { display: flex; gap: 20px; justify-content: center; }
.btn { padding: 14px 32px; border-radius: var(--radius-md); font-weight: 600; font-size: 15px; cursor: pointer; border: none; transition: 0.2s; }
.btn-primary { background: var(--primary); color: white; box-shadow: 0 4px 14px 0 rgba(0,118,255,0.39); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,118,255,0.23); }
.btn-secondary { background: var(--bg-card); color: var(--text-dark); box-shadow: 0 4px 14px 0 rgba(0,0,0,0.1); border: 1px solid var(--border); }
.btn-secondary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.15); }

/* Stats */
.stats { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin-bottom: 80px; padding: 0 20px; }
.stat-box { background: var(--bg-card); padding: 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); text-align: center; min-width: 200px; border: 1px solid var(--border); }
.stat-box h3 { font-size: 36px; font-weight: 700; color: var(--primary); margin-bottom: 5px; }
.stat-box p { font-size: 13px; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 1px; }

/* Sections */
.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }
.section-title { font-size: 32px; font-weight: 700; text-align: center; margin-bottom: 50px; letter-spacing: -0.5px; }

/* About Tech */
.about-box { background: var(--bg-card); border-radius: var(--radius-lg); padding: 50px; text-align: center; box-shadow: var(--shadow-soft); border: 1px solid var(--border); margin-bottom: 80px; position: relative; overflow: hidden; }
.about-box::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, var(--primary), var(--secondary)); }
.about-box p { font-size: 16px; color: var(--text-muted); margin-bottom: 20px; }
.about-box p:last-child { margin-bottom: 0; }

/* Tech Grid */
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-bottom: 80px; }
.feat-card { background: var(--bg-card); padding: 40px 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); border: 1px solid var(--border); transition: 0.3s; }
.feat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: var(--primary-light); }
.feat-icon { width: 50px; height: 50px; background: var(--primary-light); color: var(--primary); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 20px; }
.feat-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.feat-card p { font-size: 14px; color: var(--text-muted); }

/* Steps */
.guide-container { margin-bottom: 80px; }
.guide-item { display: flex; align-items: flex-start; gap: 20px; background: var(--bg-card); padding: 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); border: 1px solid var(--border); margin-bottom: 20px; }
.guide-num { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: white; width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 16px; flex-shrink: 0; }
.guide-content h3 { font-size: 18px; margin-bottom: 5px; }
.guide-content p { font-size: 14px; color: var(--text-muted); }

/* FAQ */
.faq-list { margin-bottom: 80px; }
.faq-item { background: var(--bg-card); padding: 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); border: 1px solid var(--border); margin-bottom: 20px; }
.faq-q { font-size: 16px; font-weight: 600; margin-bottom: 10px; color: var(--text-dark); display: flex; align-items: flex-start; gap: 10px; }
.faq-q::before { content: ''; display: inline-block; width: 6px; height: 18px; background: var(--primary); border-radius: 3px; margin-top: 2px; }
.faq-a { font-size: 14px; color: var(--text-muted); padding-left: 16px; }

/* Images */
.showcase-img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); border: 1px solid var(--border); margin-bottom: 80px; display: block; }

/* Footer */
.footer { background: var(--bg-card); border-top: 1px solid var(--border); padding: 40px 20px; text-align: center; }
.footer-links { display: flex; justify-content: center; gap: 20px; margin-bottom: 15px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: var(--text-muted); font-weight: 500; }
.footer-links a:hover { color: var(--primary); }
.footer-copy { color: #999; font-size: 12px; }

@media (max-width: 768px) {
    .hero h1 { font-size: 40px; }
    .btn-group { flex-direction: column; }
    .nav-links { display: none; }
}