:root{--g:#1f7a55;--gd:#185a3c;--gt:#e3ede8;--gw:#edf2f0;--ink:#1c2330;--ink2:#4a5363;--mute:#6b7482;--line:#e3e6eb;--line2:#d9dde2;--bg:#fff;--soft:#fafbfa;--tip:#eaf5ee;--imp:#fef3c7;--note:#e8f0fb;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3{margin:0;letter-spacing:-.01em;line-height:1.2}p{margin:0 0 12px}a{color:var(--g)}
.skip{position:absolute;left:-999px;top:0;background:#fff;color:var(--ink);padding:8px 14px;z-index:50}.skip:focus{left:8px;top:8px}
.hw{max-width:1180px;margin:0 auto;padding:0 24px}.hw.narrow{max-width:860px}
.hh{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:30}
.hh .hw{display:flex;align-items:center;gap:16px;padding-top:12px;padding-bottom:12px;flex-wrap:nowrap}
.hb{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}.hb img{display:block;height:25px;width:auto}
.hbt{font-weight:700;font-size:13px;color:var(--gd);background:var(--gt);border-radius:20px;padding:2px 10px}
.hn{display:flex;gap:18px;margin-left:6px}.hn a{color:var(--ink2);text-decoration:none;font-size:14.5px;padding:4px 0;border-bottom:2px solid transparent}.hn a:hover{color:var(--g)}.hn a.on{color:var(--g);font-weight:600;border-color:var(--g)}
.sp{flex:1}
.hbtn{display:inline-block;border-radius:8px;padding:8px 14px;font-size:14px;background:#fff;border:1px solid #c9d1cd;color:var(--ink);text-decoration:none;font-family:inherit;cursor:pointer}.hbtn:hover{border-color:var(--g)}
.hbtn.g{background:var(--g);border-color:var(--g);color:#fff;font-weight:600}.hbtn.g:hover{background:var(--gd)}.hbtn.big{padding:12px 22px;font-size:15.5px;margin:4px 0 14px}
.hs,.hero-search{position:relative;display:flex;align-items:center;background:#fff;border:1px solid #c9d1cd;border-radius:10px;padding:0 12px}
.hs{flex:0 1 230px;min-width:120px}.hb,.hn a,.hbtn{white-space:nowrap}.hb{flex:none}.hbtn{flex:none}.hs:focus-within,.hero-search:focus-within{border-color:var(--g);box-shadow:0 0 0 3px rgba(31,122,85,.15)}
.hs input,.hero-search input{flex:1;border:0;outline:0;background:transparent;font:inherit;padding:10px 8px;min-width:0;color:var(--ink)}
.hs input{font-size:14px;padding:8px 6px}.hero-search{max-width:600px;margin:0 auto;text-align:left}
.hi{width:18px;height:18px;stroke:var(--mute);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none;vertical-align:middle}
.crumb .hi{width:13px;height:13px;margin:0 2px}
.sr{position:absolute;left:0;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--line2);border-radius:10px;box-shadow:0 14px 34px -14px rgba(28,35,48,.35);z-index:40;max-height:60vh;overflow:auto;text-align:left}
.hs .sr{left:auto;width:min(460px,92vw);right:0}
.sr a{display:block;padding:10px 14px;color:var(--ink);text-decoration:none;border-top:1px solid #f0f2f5}.sr a:first-child{border-top:0}.sr a:hover,.sr a.hot{background:var(--gw)}
.sr a b{display:block;font-size:14.5px}.sr a small{color:var(--mute);font-size:12.5px}.sr .none{padding:12px 14px;color:var(--mute);font-size:14px}
.hero{background:var(--gw);border-bottom:1px solid #dbe5df;padding:56px 0 48px;text-align:center}
.hero h1{font-size:36px;margin-bottom:8px}.hero p{color:var(--ink2);margin-bottom:18px}
.pop{margin-top:14px;font-size:13px;color:var(--ink2)}.pop a{display:inline-block;background:#fff;border:1px solid #d6dfd9;border-radius:20px;padding:3px 12px;margin:3px;color:var(--ink);text-decoration:none}.pop a:hover{border-color:var(--g);color:var(--g)}
.hp{padding:36px 0 56px}.hp h1{font-size:30px;margin-bottom:8px}.lead{color:var(--ink2);font-size:16.5px}.muted{color:var(--mute);font-size:14px}
.cats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cat{display:block;border:1px solid var(--line);border-radius:12px;padding:18px;text-decoration:none;color:var(--ink);transition:border-color .15s,box-shadow .15s,transform .15s}.cat:hover{border-color:var(--g);box-shadow:0 10px 24px -16px rgba(31,122,85,.5);transform:translateY(-2px)}
.cat .ic{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--gd);margin-bottom:10px}
.cat b{display:block;font-size:16px}.cat .d{display:block;color:var(--mute);font-size:14px;margin-top:2px}.cat .n{display:block;margin-top:10px;color:var(--g);font-size:13px;font-weight:600}
.two{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:22px}
.box{border:1px solid var(--line);border-radius:12px;padding:18px}.box h2{font-size:16px;margin-bottom:8px}
.box a{display:block;padding:8px 0;border-top:1px solid #f0f2f5;color:var(--ink);text-decoration:none;font-size:15px}.box h2+a{border-top:0}.box a:hover{color:var(--g)}.box a.more{color:var(--g);font-weight:600}
.pill{display:inline-block;background:var(--gt);color:var(--gd);border-radius:20px;padding:1px 10px;font-size:12px;font-weight:700}.pill.new{background:#dbeafe;color:#1d4ed8}
.crumb{color:var(--mute);font-size:13.5px;padding:14px 0 6px}.crumb a{color:var(--mute);text-decoration:none}.crumb a:hover{color:var(--g)}.crumb b{color:var(--ink);font-weight:600}
.results{list-style:none;margin:18px 0 0;padding:0}.results li{border-top:1px solid var(--line)}.results li:first-child{border-top:0}
.results a{display:block;padding:14px 4px;text-decoration:none;color:var(--ink)}.results a:hover b{color:var(--g)}.results b{display:block;font-size:16.5px}.results span{display:block;color:var(--ink2);font-size:14.5px;margin-top:2px}
.art{display:grid;grid-template-columns:240px minmax(0,1fr) 200px;gap:32px;padding-top:12px;padding-bottom:56px}.art.notoc{grid-template-columns:240px minmax(0,1fr)}
.tree{font-size:14px;align-self:start;position:sticky;top:78px}.tree b{display:block;margin:0 0 6px;font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--mute)}
.tree a{display:block;padding:6px 10px;border-radius:6px;color:#3c4a43;text-decoration:none;line-height:1.35}.tree a:hover{background:var(--soft)}.tree a.on{background:var(--gt);color:var(--ink);font-weight:600}
.body{max-width:760px;min-width:0}.body h1{font-size:32px}.body .meta{color:var(--mute);font-size:13.5px;margin:6px 0 18px}
.body h2{font-size:21px;margin:30px 0 8px;padding-bottom:6px;border-bottom:1px solid #eef0f3;scroll-margin-top:84px}
.body ol,.body ul{padding-left:22px;margin:0 0 14px}.body li{margin:0 0 8px}.body code{background:#f1f3f5;border-radius:4px;padding:1px 5px;font-size:.92em}
.body img{max-width:100%;height:auto;border-radius:10px;border:1px solid var(--line2)}
.call{border-left:4px solid;border-radius:0 8px 8px 0;padding:10px 14px;margin:14px 0;font-size:15px}.call p:last-child{margin-bottom:0}
.call.tip{background:var(--tip);border-color:var(--g)}.call.imp{background:var(--imp);border-color:#d97706}.call.note{background:var(--note);border-color:#2563eb}
.toc{position:sticky;top:78px;align-self:start;font-size:13.5px;border-left:2px solid var(--line);padding-left:14px}.toc b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--mute);margin-bottom:6px}
.toc a{display:block;padding:4px 0;color:var(--ink2);text-decoration:none}.toc a.on{color:var(--g);font-weight:600}
.helpful{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:28px 0 10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}.helpful button{border-radius:8px;border:1px solid #c9d1cd;background:#fff;padding:6px 14px;font:inherit;font-size:14px;cursor:pointer;color:var(--ink)}.helpful button:hover{border-color:var(--g)}.helpful .thanks{flex-basis:100%;margin:6px 0 0;color:var(--gd);font-size:14px}
.stuck{color:var(--ink2);font-size:14.5px;margin-bottom:6px}
.relh{margin-top:26px!important}.rel{display:grid;grid-template-columns:1fr 1fr;gap:10px}.rel a{border:1px solid var(--line);border-radius:10px;padding:10px 12px;color:var(--ink);text-decoration:none;font-size:14.5px;line-height:1.4}.rel a:hover{border-color:var(--g)}.rel small{display:block;color:var(--mute);margin-top:2px}
.ver{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:0 0 12px;scroll-margin-top:84px}.ver .vh{display:flex;gap:10px;align-items:center;margin-bottom:6px;flex-wrap:wrap}.ver p{margin:0;color:var(--ink2);font-size:15px}
.tk{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.hf{border-top:1px solid var(--line);background:var(--soft);color:var(--mute);font-size:13px}.hf .hw{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;padding-top:16px;padding-bottom:16px}.hf a{color:var(--ink);font-weight:600}
@media(max-width:1000px){.art,.art.notoc{grid-template-columns:minmax(0,1fr)}.tree,.toc{display:none}.cats{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.hw{padding:0 16px}.hh .hw{gap:10px}.hn{gap:16px}.hero{padding:36px 0 32px}.hero h1{font-size:28px}.cats,.two,.rel,.tk{grid-template-columns:1fr}.body h1{font-size:26px}}
@media print{.hh,.hf,.tree,.toc,.helpful,.stuck,.rel,.relh,.skip{display:none!important}.art{display:block}body{font-size:12pt}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.cat{transition:none}}
.body figure{margin:16px 0 18px}.body figcaption{font-size:13px;color:var(--mute);margin-top:6px}
.body figure.shot a.zoom{display:block;border:1px solid var(--line2);border-radius:10px;overflow:hidden;box-shadow:0 14px 30px -18px rgba(28,35,48,.45);background:#fff;cursor:zoom-in;text-decoration:none}
.body figure.shot .fbar{display:flex;gap:6px;padding:8px 12px;background:#f1f3f5;border-bottom:1px solid var(--line)}.body figure.shot .fbar i{width:9px;height:9px;border-radius:50%;background:#cfd4da;display:block}
.body figure.shot img{display:block;width:100%;height:auto;border:0;border-radius:0}
.body figure.crop{max-width:380px}.body figure.crop a.zoom{display:block;cursor:zoom-in}.body figure.crop img{display:block;border:1px solid var(--line2);border-radius:10px;box-shadow:0 14px 30px -18px rgba(28,35,48,.45)}
.lb{position:fixed;inset:0;background:rgba(20,26,36,.82);z-index:80;display:flex;align-items:center;justify-content:center;padding:24px;cursor:zoom-out}.lb img{max-width:100%;max-height:100%;border-radius:8px;background:#fff}.lb button{position:absolute;top:14px;right:18px;border:0;background:#fff;border-radius:20px;padding:6px 14px;font:inherit;cursor:pointer}
@media print{.body figure{break-inside:avoid}}

@media(max-width:1100px){.hh .hw{gap:12px}.hn{gap:12px;margin-left:0}.hn a{font-size:14px}.hbtn{padding:8px 11px;font-size:13.5px}.hs{flex:1 1 120px}.hbt{display:none}}
@media(max-width:860px){.hh{position:static}.hh .hw{flex-wrap:wrap}.hn{order:5;width:100%;overflow-x:auto}.hs{order:4;flex:1 1 160px}.sp{display:none}.hbtn.g{display:none}}
.chk{list-style:none;padding:0!important}.chk li{padding-left:28px;position:relative}.chk li:before{content:"";position:absolute;left:2px;top:5px;width:14px;height:14px;border:2px solid var(--g);border-radius:4px}
.guides{margin-top:34px}.guides h2{font-size:20px;margin-bottom:12px}.gl{display:grid;grid-template-columns:1fr 1fr;gap:10px}.gl a{display:block;border:1px solid var(--line);border-radius:10px;padding:12px 14px;color:var(--ink);text-decoration:none;font-weight:600;font-size:15px;line-height:1.35}.gl a:hover{border-color:var(--g);color:var(--g)}.gl a small{display:block;font-weight:400;color:var(--mute);margin-top:3px;font-size:12.5px}
@media(max-width:700px){.gl{grid-template-columns:1fr}}