*,*:before,*:after{box-sizing:border-box}:root{--bg-gradient: radial-gradient(circle at top left, #4f46e5, #0f172a);--card-bg: #ffffff;--card-radius: 18px;--border-subtle: rgba(148, 163, 184, .35);--text-main: #0f172a;--text-muted: #6b7280;--accent: #4f46e5;--accent-soft: rgba(79, 70, 229, .08);--accent-strong: rgba(79, 70, 229, .12)}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--text-main);background:var(--bg-gradient);background-attachment:fixed}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{max-width:1100px;width:100%;margin:1.8rem auto 2.5rem;padding:0 1.5rem;flex:1}.app-footer{padding:1.3rem 1.5rem 1.8rem;text-align:center;font-size:.85rem;color:#e2e8f0e6}.app-header{position:sticky;top:0;z-index:20;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#0f172ae0;border-bottom:1px solid rgba(148,163,184,.35)}.header-inner{max-width:1100px;margin:0 auto;padding:.7rem 1.5rem;display:flex;align-items:center;gap:1.5rem}.logo{display:flex;align-items:center;gap:.55rem;text-decoration:none}.logo-mark{width:30px;height:30px;border-radius:999px;background:linear-gradient(135deg,#6366f1,#a855f7);display:inline-flex;align-items:center;justify-content:center;font-size:.9rem;color:#fff;box-shadow:0 10px 25px #0f172ab3}.logo-text{font-weight:700;letter-spacing:.04em;font-size:1.1rem;color:#e5e7eb}.logo-dot{color:#a5b4fc}.main-nav{display:flex;align-items:center;gap:.75rem;margin-left:2rem;flex:1}.nav-link{position:relative;padding:.35rem .65rem;font-size:.88rem;color:#cbd5f5;text-decoration:none;border-radius:999px;transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease}.nav-link:hover{background:#94a3b840;color:#f9fafb;transform:translateY(-1px);box-shadow:0 4px 12px #0f172a99}.nav-link--highlight{background:#38bdf81f;border:1px solid rgba(56,189,248,.4);color:#e0f2fe}.nav-link--highlight:hover{background:#38bdf829}.nav-link.router-link-active{background:#4f46e533;color:#e5e7eb}.lang-switch{display:flex;align-items:center;gap:.25rem;font-size:.78rem;background:#0f172a4d;border-radius:999px;padding:.15rem .25rem;border:1px solid rgba(148,163,184,.6)}.lang-button{background:transparent;border:none;color:#cbd5f5;padding:.15rem .5rem;border-radius:999px;cursor:pointer;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;opacity:.7;transition:background .18s ease,color .18s ease,opacity .18s ease}.lang-button--active{background:#4f46e5e6;color:#fff;opacity:1}.lang-button:hover{opacity:1}.lang-divider{color:#94a3b8e6}.card{background:var(--card-bg);border-radius:var(--card-radius);padding:1.8rem 1.9rem;box-shadow:0 18px 45px #0f172a2e,0 0 0 1px var(--border-subtle);border:1px solid rgba(148,163,184,.35)}.page-content{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.page-title{font-size:2rem;margin:0 0 .75rem;letter-spacing:-.03em}.lead-text{font-size:.98rem;color:var(--text-muted);line-height:1.6;margin-bottom:1.7rem}.page-subtitle{font-size:1.2rem;margin:1.5rem 0 .5rem}.article-section{margin-top:1.4rem}.article-section h2{font-size:1.1rem;margin:0 0 .4rem}.article-section p,.article-section ul{font-size:.95rem;color:var(--text-muted);line-height:1.7}.article-section ul{padding-left:1.2rem}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1.3rem}.feature-card{border-radius:14px;padding:1.1rem 1.1rem 1rem;background:linear-gradient(145deg,#f8fafcf5,#f1f5f9f5);border:1px solid rgba(148,163,184,.35);box-shadow:0 12px 28px #0f172a14;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.feature-card:hover{transform:translateY(-3px);box-shadow:0 16px 40px #0f172a29;border-color:#4f46e573}.feature-icon{font-size:1.5rem;margin-bottom:.3rem}.feature-title{font-size:.98rem;font-weight:600;margin-bottom:.25rem}.feature-text{font-size:.9rem;color:var(--text-muted)}pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:.85rem;border-radius:12px;padding:1rem 1.1rem;background:#0b1120;color:#e5e7eb;overflow-x:auto;border:1px solid rgba(148,163,184,.6)}@media(max-width:840px){.header-inner{flex-wrap:wrap;justify-content:space-between;gap:.8rem}.main-nav{order:3;flex-wrap:wrap;margin-left:0;justify-content:flex-start;padding-bottom:.4rem}.main-content{margin-top:1.2rem}}@media(max-width:600px){.card{padding:1.3rem 1.2rem}.page-title{font-size:1.6rem}}