:root {
    --ig-orange: #f09433;
    --ig-red: #e6683c;
    --ig-pink: #dc2743;
    --ig-purple: #cc2366;
    --ig-violet: #bc1888;
    --ig-gradient: linear-gradient(135deg, var(--ig-orange), var(--ig-red), var(--ig-pink), var(--ig-purple), var(--ig-violet));
    --bg-dark: #121212;
    --bg-card-dark: #1a1a1a;
    --text-light: #ffffff;
    --text-muted: #a0a0a0;
    --border-dark: #262626;
    --shadow-glow: 0 0 40px rgba(220, 39, 67, 0.4);
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif; }
body { background: var(--bg-dark); color: var(--text-light); line-height: 1.6; }
a { text-decoration: none; color: inherit; }

/* Glowing Nav */
.nav { display: flex; justify-content: space-between; align-items: center; padding: 20px 5%; background: rgba(18,18,18,0.8); backdrop-filter: blur(15px); border-bottom: 1px solid var(--border-dark); position: sticky; top: 0; z-index: 100; }
.nav-brand { font-size: 26px; font-weight: 900; background: var(--ig-gradient); -webkit-background-clip: text; color: transparent; letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { color: var(--text-muted); font-size: 15px; font-weight: 600; transition: color 0.3s; }
.nav-links a:hover { color: #fff; }

/* Dynamic Hero */
.hero { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 80vh; text-align: center; padding: 60px 20px; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; width: 60vw; height: 60vh; background: var(--ig-gradient); filter: blur(120px); opacity: 0.15; z-index: 0; border-radius: 50%; top: 50%; left: 50%; transform: translate(-50%, -50%); pointer-events: none; }
.hero-content { position: relative; z-index: 1; max-width: 850px; }
.hero h1 { font-size: 60px; font-weight: 900; margin-bottom: 20px; line-height: 1.2; letter-spacing: -1px; text-shadow: 0 2px 10px rgba(0,0,0,0.5); }
.hero p { font-size: 20px; color: var(--text-muted); margin-bottom: 40px; font-weight: 500; }
.btn-group { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.btn { padding: 16px 36px; border-radius: 50px; font-size: 16px; font-weight: bold; cursor: pointer; transition: all 0.3s ease; border: none; }
.btn-primary { background: var(--ig-gradient); color: white; box-shadow: var(--shadow-glow); }
.btn-primary:hover { box-shadow: 0 0 60px rgba(220, 39, 67, 0.6); transform: translateY(-2px) scale(1.02); }
.btn-secondary { background: rgba(255,255,255,0.05); color: white; border: 1px solid rgba(255,255,255,0.1); backdrop-filter: blur(5px); }
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.3); transform: translateY(-2px); }

/* Data Bar */
.data-bar { display: flex; justify-content: center; gap: 60px; flex-wrap: wrap; padding: 50px 20px; background: rgba(255,255,255,0.02); border-top: 1px solid var(--border-dark); border-bottom: 1px solid var(--border-dark); position: relative; z-index: 1; }
.data-item { text-align: center; }
.data-item h3 { font-size: 40px; font-weight: 900; background: var(--ig-gradient); -webkit-background-clip: text; color: transparent; margin-bottom: 5px; }
.data-item p { font-size: 14px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 2px; }

/* Sections */
.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; position: relative; z-index: 1; }
.section-title { font-size: 36px; font-weight: 900; text-align: center; margin-bottom: 50px; }

/* Glowing Cards */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.card { background: var(--bg-card-dark); padding: 40px 30px; border-radius: 20px; border: 1px solid var(--border-dark); transition: all 0.3s ease; position: relative; overflow: hidden; }
.card:hover { transform: translateY(-10px); border-color: var(--ig-pink); box-shadow: 0 10px 30px rgba(220, 39, 67, 0.1); }
.card::after { content: ""; position: absolute; width: 100px; height: 100px; background: var(--ig-gradient); filter: blur(50px); opacity: 0; bottom: -20px; right: -20px; transition: opacity 0.3s ease; pointer-events: none; }
.card:hover::after { opacity: 0.3; }
.card h3 { font-size: 22px; font-weight: 800; margin-bottom: 15px; color: white; }
.card p { font-size: 15px; color: var(--text-muted); line-height: 1.6; }

/* Images */
.img-fluid { max-width: 100%; height: auto; border-radius: 20px; display: block; margin: 40px auto; border: 1px solid var(--border-dark); box-shadow: 0 20px 50px rgba(0,0,0,0.5); }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg-card-dark); padding: 25px 30px; border-radius: 16px; border: 1px solid var(--border-dark); margin-bottom: 20px; transition: 0.2s; }
.faq-item:hover { border-color: rgba(255,255,255,0.2); }
.faq-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--ig-pink); }
.faq-item p { font-size: 15px; color: var(--text-muted); }

/* Guide */
.guide-container { display: flex; flex-wrap: wrap; justify-content: center; gap: 25px; }
.guide-step { background: var(--bg-card-dark); border: 1px solid var(--border-dark); padding: 30px; border-radius: 16px; flex: 1; min-width: 240px; text-align: center; position: relative; }
.step-num { width: 60px; height: 60px; margin: 0 auto 20px; background: var(--ig-gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: 900; color: white; box-shadow: 0 5px 15px rgba(220,39,67,0.4); }
.guide-step h3 { font-size: 18px; font-weight: 800; margin-bottom: 10px; }
.guide-step p { font-size: 14px; color: var(--text-muted); }

/* Footer */
.footer { padding: 60px 20px; text-align: center; border-top: 1px solid var(--border-dark); background: rgba(0,0,0,0.3); }
.footer-links { display: flex; justify-content: center; gap: 30px; margin-bottom: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); font-size: 14px; font-weight: 600; transition: color 0.2s; }
.footer-links a:hover { color: white; }
.footer p { font-size: 13px; color: #555; }