:root{--bg:#0a0c11;--bg-2:#0d1016;--card:#12161f;--card-border:rgba(255,255,255,0.08);--text:#eef2f7;--text-dim:#9aa7b8;--text-faint:#64748b;--accent:#4c8dff;--accent-soft:rgba(76,141,255,0.12);--radius:14px;--font:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;}*{margin:0;padding:0;box-sizing:border-box;}html{scroll-behavior:smooth;}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased;}::selection{background:var(--accent-soft);}.container{width:min(1160px,92vw);margin:0 auto;}.section{padding:96px 0;position:relative;}.section-head{max-width:720px;margin:0 auto 56px;text-align:center;}.section-head h2{font-size:clamp(26px,3.4vw,36px);font-weight:800;letter-spacing:0.02em;margin-bottom:12px;color:var(--text);}.section-head p{color:var(--text-dim);font-size:15px;}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 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