:root { --primary:#5941F2; --primary-light:#7879FF; }
[data-theme="light"]{--bg-primary:#FFFFFF;--bg-secondary:#F8F5FF;--bg-tertiary:#E8E0FF;--text-primary:#121622;--text-secondary:#3f4350;--text-tertiary:#6b7280;--border:#E8E0FF;}
[data-theme="dark"]{--bg-primary:#0F0A1F;--bg-secondary:#1A1040;--bg-tertiary:#2D2060;--text-primary:#F1F5F9;--text-secondary:#CBD5E1;--text-tertiary:#94A3B8;--border:#2D2060;}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.7;transition:background-color .3s,color .3s;}
a{color:var(--primary);text-decoration:none;}
a:hover{text-decoration:underline;}
.skip-link{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.skip-link:focus{position:fixed;top:0;left:0;width:auto;height:auto;clip:auto;padding:10px 16px;background:var(--primary);color:#fff;z-index:2000;}
.header{position:sticky;top:0;z-index:1000;padding:14px 20px;background:var(--bg-primary);border-bottom:1px solid var(--border);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);}
.header-container{max-width:1100px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;}
.logo{display:flex;align-items:center;gap:10px;color:var(--text-primary);font-weight:700;font-size:19px;}
.logo img{width:26px;height:26px;border-radius:7px;}
.header-nav{display:flex;align-items:center;gap:22px;}
.header-nav a{color:var(--text-secondary);font-size:15px;font-weight:500;}
.header-nav a:hover{color:var(--primary);text-decoration:none;}
.theme-toggle{width:40px;height:40px;border-radius:11px;border:2px solid var(--border);background:var(--bg-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;}
.theme-toggle svg{width:18px;height:18px;color:var(--text-primary);}
.theme-toggle .sun-icon{display:none;}[data-theme="dark"] .theme-toggle .sun-icon{display:block;}[data-theme="dark"] .theme-toggle .moon-icon{display:none;}
.wrap{max-width:760px;margin:0 auto;padding:48px 20px 24px;}
.breadcrumb{font-size:14px;color:var(--text-tertiary);margin-bottom:20px;}
.breadcrumb a{color:var(--text-tertiary);}
.breadcrumb a:hover{color:var(--primary);}
article h1{font-size:40px;font-weight:800;line-height:1.15;letter-spacing:-.5px;margin-bottom:16px;}
.meta{font-size:14px;color:var(--text-tertiary);margin-bottom:32px;}
.lede{font-size:20px;color:var(--text-secondary);margin-bottom:32px;}
article h2{font-size:27px;font-weight:700;margin:40px 0 14px;letter-spacing:-.3px;}
article h3{font-size:20px;font-weight:600;margin:28px 0 10px;}
article p{font-size:17px;color:var(--text-secondary);margin-bottom:18px;}
article ul,article ol{margin:0 0 18px 26px;}
article li{font-size:17px;color:var(--text-secondary);margin-bottom:9px;}
article strong{color:var(--text-primary);}
.callout{background:var(--bg-secondary);border-left:4px solid var(--primary);border-radius:10px;padding:22px 24px;margin:28px 0;}
.callout p{margin-bottom:0;color:var(--text-primary);}
.cta-box{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);border-radius:18px;padding:32px;text-align:center;margin:40px 0;color:#fff;}
.cta-box h3{color:#fff;font-size:23px;margin:0 0 8px;}
.cta-box p{color:rgba(255,255,255,.92);margin-bottom:20px;}
.cta-buttons{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}
.cta-buttons a{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--primary);font-weight:600;padding:12px 22px;border-radius:12px;}
.cta-buttons a:hover{text-decoration:none;transform:translateY(-1px);}
.faq{margin-top:48px;}
.faq h2{margin-bottom:20px;}
.faq-q{background:var(--bg-secondary);border-radius:12px;padding:20px 22px;margin-bottom:14px;}
.faq-q h3{margin:0 0 8px;font-size:17px;color:var(--text-primary);}
.faq-q p{margin:0;font-size:16px;}
.related{margin:48px 0;padding-top:28px;border-top:1px solid var(--border);}
.related h2{font-size:22px;margin-bottom:16px;}
.related a{display:block;font-size:17px;font-weight:600;margin-bottom:10px;}
footer{padding:48px 20px;background:var(--bg-secondary);border-top:1px solid var(--border);margin-top:48px;}
.footer-container{max-width:1100px;margin:0 auto;display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px;align-items:center;}
.footer-links{display:flex;gap:24px;flex-wrap:wrap;}
.footer-links a{color:var(--text-secondary);font-size:15px;}
.footer-bottom{max-width:1100px;margin:24px auto 0;text-align:center;color:var(--text-tertiary);font-size:14px;padding-top:24px;border-top:1px solid var(--border);}
.post-card{display:block;background:var(--bg-secondary);border:1px solid var(--border);border-radius:16px;padding:26px;margin-bottom:20px;transition:transform .2s,box-shadow .2s;}
.post-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(89,65,242,.12);text-decoration:none;}
.post-card h2{font-size:22px;color:var(--text-primary);margin:0 0 8px;}
.post-card p{color:var(--text-secondary);font-size:16px;margin:0;}
@media(max-width:600px){article h1{font-size:30px;}article h2{font-size:23px;}.lede{font-size:18px;}.header-nav a:not(.theme-toggle){display:none;}}