:root{--bg: #0e1117;--surface: #161b24;--surface-2: #1d232e;--border: #2a323f;--text: #e6eaf0;--text-dim: #9099a8;--accent: #4f8cff;--accent-hover: #3d7bf0;--accent-soft: rgba(79, 140, 255, .14);--ok: #34d399;--warn: #fbbf24;--radius: 12px;--wrap: 1180px;--header-h: 60px;color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Malgun Gothic,Yu Gothic UI,Microsoft YaHei,Nirmala UI,Roboto,sans-serif;font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em;letter-spacing:-.02em}h1{font-size:clamp(1.75rem,1.2rem + 2.2vw,2.7rem);font-weight:800}h2{font-size:clamp(1.3rem,1.05rem + 1.1vw,1.8rem);font-weight:700}h3{font-size:1.05rem;font-weight:700}p{margin:0 0 1em}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}img,svg{max-width:100%}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}.muted{color:var(--text-dim)}.center{text-align:center}.skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--accent);color:#fff;padding:10px 16px;border-radius:0 0 8px}.skip:focus{left:0}.site-header{position:sticky;top:0;z-index:40;height:var(--header-h);display:flex;align-items:center;background:#161b24eb;backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}.site-header .wrap{display:flex;align-items:center;gap:14px}.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1rem;color:var(--text);letter-spacing:-.02em;white-space:nowrap}.brand:hover{text-decoration:none}.brand-mark{width:28px;height:28px;border-radius:8px;flex-shrink:0;background:linear-gradient(135deg,var(--accent),#8b5cf6);display:grid;place-items:center;font-size:15px}.brand em{font-style:normal;color:var(--text-dim);font-weight:600}.main-nav{display:flex;gap:2px;margin-left:6px}.main-nav a{padding:7px 12px;border-radius:8px;font-size:.875rem;font-weight:500;color:var(--text-dim)}.main-nav a:hover{color:var(--text);background:var(--surface-2);text-decoration:none}.main-nav a[aria-current=page]{color:var(--text);background:var(--surface-2)}.header-spacer{flex:1;min-width:0}.site-header .btn,.site-header .lang-btn{flex-shrink:0;white-space:nowrap}.site-header .info-btn{padding:8px 12px;font-size:.82rem;gap:6px;line-height:1.4}.site-header .info-btn .info-icon{display:none;font-size:1.15rem;line-height:1}@media(max-width:860px){.site-header .info-btn .info-label{display:none}.site-header .info-btn .info-icon{display:block}.site-header .info-btn{padding:9px 12px}}@media(max-width:820px){.main-nav{display:none}}@media(max-width:720px){.main-nav{display:none}.site-header .wrap{padding:0 14px;gap:10px}.lang-btn{padding:8px 11px;font-size:.78rem;gap:5px}}@media(max-width:430px){.lang-btn .lang-name{display:none}.brand{font-size:.92rem}.brand-mark{width:25px;height:25px;font-size:13px}}.lang{position:relative}.lang-btn{display:flex;align-items:center;gap:7px;padding:8px 13px;border-radius:999px;cursor:pointer;border:1px solid var(--accent);background:var(--accent-soft);color:var(--accent);font:inherit;font-size:.82rem;font-weight:600;white-space:nowrap}.lang-btn:hover{background:#4f8cff38}.lang-menu{position:absolute;top:calc(100% + 8px);right:0;z-index:50;min-width:200px;max-height:340px;overflow-y:auto;padding:6px;background:var(--surface-2);border:1px solid var(--border);border-radius:12px;box-shadow:0 16px 40px #0000008c;list-style:none;margin:0}.lang-menu[hidden]{display:none}.lang-menu a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 11px;border-radius:8px;font-size:.875rem;color:var(--text)}.lang-menu a:hover{background:var(--surface);text-decoration:none}.lang-menu a[aria-current=true]{color:var(--accent)}.lang-menu .check{opacity:0}.lang-menu a[aria-current=true] .check{opacity:1}.lang-sep{height:1px;background:var(--border);margin:6px 4px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:10px;cursor:pointer;border:1px solid var(--border);background:var(--surface-2);color:var(--text);font:inherit;font-size:.9rem;font-weight:600}.btn:hover{border-color:var(--accent);text-decoration:none}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-ghost{background:transparent}.hero{padding:46px 0 26px;text-align:center}.hero p.lead{max-width:640px;margin:0 auto 20px;font-size:1.06rem;color:var(--text-dim)}.trust-pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;margin-bottom:18px;border-radius:999px;background:#34d3991f;border:1px solid rgba(52,211,153,.3);color:var(--ok);font-size:.8rem;font-weight:600}section{scroll-margin-top:calc(var(--header-h) + 12px)}.section{padding:40px 0}.section>h2{margin-bottom:18px}.section>h2>a{color:inherit}.section>h2>a:hover{color:var(--accent);text-decoration:none}.grid-3{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.card h3{margin-bottom:6px}.card p{margin:0;color:var(--text-dim);font-size:.925rem}.card .ico{font-size:1.5rem;display:block;margin-bottom:10px}.steps{counter-reset:step;display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.steps .card{position:relative;padding-top:24px}.steps .card:before{counter-increment:step;content:counter(step);position:absolute;top:-14px;left:20px;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:.85rem;font-weight:700}.trust-box{background:linear-gradient(180deg,rgba(52,211,153,.07),transparent);border:1px solid rgba(52,211,153,.25);border-radius:var(--radius);padding:24px}.trust-box h2{color:var(--ok);font-size:1.25rem}.trust-box p{margin:0;color:var(--text-dim)}.faq{display:grid;gap:10px}.faq details{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:14px 18px}.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--accent);font-size:1.2rem;line-height:1}.faq details[open] summary:after{content:"−"}.faq details p{margin:12px 0 0;color:var(--text-dim);font-size:.94rem}.prose{max-width:760px;margin:0 auto;padding:36px 0 20px}.prose h2{margin-top:1.7em;font-size:1.2rem}.prose p{color:var(--text-dim)}.prose .updated{font-size:.85rem}.prose h3{margin-top:1.5em}.prose ul,.prose ol{color:var(--text-dim);padding-left:1.35em;margin:0 0 1em}.prose li{margin-bottom:.45em}.prose li>strong{color:var(--text)}.prose strong{color:var(--text)}.prose em{color:var(--text-dim)}.prose blockquote{margin:1.2em 0;padding:2px 0 2px 16px;border-left:3px solid var(--accent);color:var(--text-dim)}.prose code{background:var(--surface-2);border:1px solid var(--border);border-radius:5px;padding:1px 5px;font-size:.88em}.prose hr{border:0;border-top:1px solid var(--border);margin:2em 0}.prose .table-scroll{overflow-x:auto;margin:0 0 1.2em}.prose table{border-collapse:collapse;width:100%;min-width:460px;font-size:.92rem}.prose th,.prose td{border-bottom:1px solid var(--border);padding:9px 12px;text-align:left;vertical-align:top}.prose thead th{color:var(--text);white-space:nowrap;background:var(--surface)}.prose td{color:var(--text-dim)}.prose tbody tr:hover td{background:var(--surface)}.crumbs{display:flex;gap:8px;font-size:.85rem;color:var(--text-dim);margin-bottom:14px}.guide-list{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:14px}.guide-card{display:block}.guide-card:hover{border-color:var(--accent);text-decoration:none}.guide-card h2{font-size:1.15rem;margin-bottom:6px;color:var(--text)}.guide-card p{margin-bottom:10px}.guide-meta{display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--text-dim)}.guide-badge{display:inline-block;padding:1px 6px;border-radius:4px;font-size:.68rem;font-weight:700;letter-spacing:.04em;border:1px solid var(--border);background:var(--surface-2);color:var(--text-dim)}.card h3 .guide-badge{margin-left:7px;vertical-align:2px}.guide-article h1{font-size:clamp(1.6rem,1.2rem + 1.6vw,2.2rem)}.guide-article .ad-slot{margin-left:0;margin-right:0}.guide-cta{margin:2.4em 0 0;padding:22px;background:linear-gradient(180deg,var(--accent-soft),transparent);border:1px solid rgba(79,140,255,.3);border-radius:var(--radius)}.guide-cta h2{margin-top:0;font-size:1.15rem}.guide-cta p{margin-bottom:14px}.ad-slot{margin:26px auto;text-align:center;overflow:hidden;min-height:100px}.ad-slot[data-fmt=inarticle]{min-height:250px}.ad-label{display:block;font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--text-dim);opacity:.65;margin-bottom:6px}.ad-slot ins{display:block}@media(max-width:640px){.ad-slot{min-height:100px}.ad-slot[data-fmt=inarticle]{min-height:250px}}dialog.info-modal{width:min(460px,calc(100vw - 32px));padding:0;border:1px solid var(--border);border-radius:14px;background:var(--surface);color:var(--text);box-shadow:0 24px 60px #0009}dialog.info-modal::backdrop{background:#080a0eb3;backdrop-filter:blur(2px)}.info-head{display:flex;align-items:center;gap:10px;padding:18px 20px 0}.info-body{padding:12px 20px 4px}.info-body p{color:var(--text-dim);font-size:.92rem}.info-list{display:grid;gap:8px;margin:16px 0 4px;padding:0;list-style:none}.info-list li{display:flex;align-items:center;gap:10px;background:var(--surface-2);border:1px solid var(--border);border-radius:9px;padding:10px 12px;font-size:.9rem}.info-list .k{color:var(--text-dim);min-width:62px;font-size:.82rem}.info-note{margin:14px 0 0;padding:10px 12px;border-radius:9px;background:#34d3991a;border:1px solid rgba(52,211,153,.25);color:var(--ok);font-size:.82rem}.info-foot{padding:14px 20px 18px;display:flex;justify-content:flex-end}.site-footer{margin-top:40px;padding:34px 0 28px;border-top:1px solid var(--border);background:var(--surface);font-size:.875rem}.footer-grid{display:grid;gap:26px;grid-template-columns:minmax(220px,1.6fr) repeat(auto-fit,minmax(140px,1fr))}.footer-grid>*{min-width:0}@media(max-width:700px){.footer-grid{gap:22px;grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid>:first-child{grid-column:1 / -1}}@media(max-width:380px){.footer-grid{grid-template-columns:1fr}}.site-footer h3{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);margin-bottom:10px}.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}.site-footer a{color:var(--text-dim)}.site-footer a:hover{color:var(--text)}.footer-bottom{margin-top:26px;padding-top:18px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;color:var(--text-dim);font-size:.8rem}.footer-note{display:inline-flex;align-items:center;gap:6px;color:var(--ok)}.editor-mount{min-height:620px}@media(max-width:900px){.editor-mount{min-height:780px}}.editor-fallback{min-height:620px;display:grid;place-items:center;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text-dim)}