:root{--bg:#fff;--bg-soft:#f5f7fb;--fg:#1b1f27;--fg-soft:#5b6472;--brand:#2f6bff;--brand-2:#7c5cff;--brand-soft:#2f6bff14;--card:#fff;--card-border:#e7ebf1;--nav-bg:#ffffffdb;--radius:14px;--radius-sm:10px;--shadow:0 4px 20px #1428500f;--maxw:1160px;--font:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif}[data-theme=dark]{--bg:#0e1116;--bg-soft:#12161d;--fg:#e7eaef;--fg-soft:#9aa2ad;--brand:#5b8cff;--brand-2:#9a7bff;--brand-soft:#5b8cff1f;--card:#171b22;--card-border:#242a34;--nav-bg:#0e1116db;--shadow:0 4px 20px #0006}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{font-family:var(--font);background:var(--bg);color:var(--fg);line-height:1.7;transition:background .3s,color .3s}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;display:block}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}.nav{z-index:50;background:var(--nav-bg);-webkit-backdrop-filter:saturate(140%)blur(8px);backdrop-filter:saturate(140%)blur(8px);border-bottom:1px solid var(--card-border);position:sticky;top:0}.nav-inner{gap:28px;height:62px}.nav-brand,.nav-inner{align-items:center;display:flex}.nav-brand{color:var(--fg);gap:8px;font-size:17px;font-weight:700}.nav-brand .logo{background:linear-gradient(135deg,var(--brand),var(--brand-2));border-radius:8px;width:26px;height:26px;display:inline-block}.nav-links{flex:1;align-items:center;gap:4px;display:flex}.nav-links a{color:var(--fg-soft);border-radius:8px;padding:8px 12px;font-size:15px}.nav-links a:hover{color:var(--fg);background:var(--brand-soft);text-decoration:none}.nav-actions{align-items:center;gap:10px;display:flex}.theme-toggle{border:1px solid var(--card-border);background:var(--card);color:var(--fg);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;font-size:16px;display:inline-flex}.theme-toggle:hover{border-color:var(--brand)}.btn{cursor:pointer;border:1px solid #0000;border-radius:10px;align-items:center;gap:8px;padding:10px 20px;font-size:15px;transition:transform .15s,box-shadow .15s;display:inline-flex}.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}.btn-primary:hover{box-shadow:0 6px 18px var(--brand-soft);text-decoration:none;transform:translateY(-1px)}.btn-ghost{color:var(--fg);border-color:var(--card-border);background:0 0}.btn-ghost:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}.hero{text-align:center;padding:72px 0 64px}.hero h1{letter-spacing:-.5px;font-size:calc(clamp(30px,5vw,46px));line-height:1.25}.hero .lead{max-width:640px;color:var(--fg-soft);margin:18px auto 30px;font-size:17px}.hero .actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.gradient-text{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#0000;-webkit-background-clip:text;background-clip:text}.section{padding:56px 0}.section-head{margin-bottom:32px}.section-head h2{font-size:26px}.section-head p{color:var(--fg-soft);margin-top:6px}.grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;display:grid}.card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;transition:transform .15s,border-color .15s}.card:hover{border-color:var(--brand);transform:translateY(-3px)}.card h3{margin-bottom:6px;font-size:18px}.card .sub{margin-bottom:10px;font-size:14px}.card .sub,.card p{color:var(--fg-soft)}.card p{font-size:14.5px}.tag{background:var(--brand-soft);color:var(--brand);border-radius:999px;margin:0 6px 6px 0;padding:3px 10px;font-size:12px;display:inline-block}.page-hero{padding:56px 0 30px}.page-hero h1{font-size:calc(clamp(26px,4vw,36px))}.breadcrumb{color:var(--fg-soft);margin-bottom:14px;font-size:14px}.breadcrumb a{color:var(--brand)}.prose{max-width:820px}.prose h2{margin:26px 0 10px;font-size:22px}.prose p{color:var(--fg);margin-bottom:12px}.prose ul{margin-bottom:12px;padding-left:22px}.prose pre{border-radius:8px;margin:12px 0;padding:14px;overflow-x:auto}.prose code,.prose pre{background:var(--bg-soft)}.prose code{border-radius:5px;padding:2px 6px;font-size:14px}.form-group{margin-bottom:16px}.form-group label{color:var(--fg-soft);margin-bottom:6px;font-size:14px;display:block}.input,.textarea,select.input{border:1px solid var(--card-border);background:var(--bg);width:100%;color:var(--fg);font-size:15px;font-family:var(--font);border-radius:10px;padding:10px 14px}.input:focus,.textarea:focus{border-color:var(--brand);outline:none}.checkbox-row{color:var(--fg-soft);align-items:center;gap:8px;font-size:14px;display:flex}.form-hint{color:var(--fg-soft);margin-top:4px;font-size:12px}.faq-item{border:1px solid var(--card-border);border-radius:var(--radius-sm);margin-bottom:10px;overflow:hidden}.faq-q{text-align:left;background:var(--card);cursor:pointer;width:100%;color:var(--fg);border:none;justify-content:space-between;align-items:center;padding:16px 18px;font-size:15px;font-weight:600;display:flex}.faq-a{color:var(--fg-soft);padding:0 18px 16px}.footer{border-top:1px solid var(--card-border);margin-top:40px;padding:30px 0 40px}.footer-inner{flex-wrap:wrap;justify-content:space-between;gap:20px;font-size:14px;display:flex}.empty,.footer a,.footer-inner,.loading{color:var(--fg-soft)}.empty{padding:48px 0}.empty,.err,.loading{text-align:center}.loading{padding:40px 0}.err{padding:60px 0}.err .code{color:var(--brand);font-size:56px;font-weight:800}.err p{color:var(--fg-soft);margin:10px 0 20px}@media (width<=760px){.nav-inner{gap:12px}.nav-links{overflow-x:auto}.nav-links a{padding:6px 9px;font-size:14px}.hero{padding:44px 0 40px}.grid{grid-template-columns:1fr}.section{padding:36px 0}}