:root{--bg:#FFFFFF;--panel:#F4F6FA;--ink:#171B23;--muted:#586071;--line:#E3E7EE;--violet:#6D28D9;--violet-d:#5B21B6;--teal:#0D9488;--warn:#B45309;--serif:Georgia,"Times New Roman",Cambria,"Noto Serif",serif;--sans:-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:17.5px/1.7 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.wrap{max-width:860px;margin:0 auto;padding:0 24px}a{color:var(--violet);text-decoration:none;border-bottom:1px solid color-mix(in srgb,var(--violet) 35%,transparent)}a:hover{border-bottom-color:var(--violet)}.topbar{height:4px;background:linear-gradient(90deg,var(--violet),var(--teal))}.hdr{position:sticky;top:0;z-index:50;background:#ffffffeb;backdrop-filter:saturate(1.4) blur(6px);border-bottom:1px solid var(--line)}.hdr-in{display:flex;align-items:center;gap:18px;max-width:860px;margin:0 auto;padding:13px 24px}.brand{font-family:var(--serif);font-weight:700;font-size:1.28rem;letter-spacing:-.01em;color:var(--ink);border:0;white-space:nowrap}.brand i{font-style:normal;color:var(--violet)}.nav{display:flex;gap:22px;margin-left:auto;align-items:center}.nav>a,.nav summary{color:var(--muted);border:0;font-size:.93rem;font-weight:500;padding:2px 0;position:relative;cursor:pointer;list-style:none;display:inline-flex;align-items:center;gap:5px}.nav>a:after{content:"";position:absolute;left:0;right:100%;bottom:-3px;height:2px;background:var(--violet);transition:right .2s}.nav>a:hover,.nav summary:hover{color:var(--ink)}.nav>a:hover:after{right:0}.nav>a[aria-current=page]{color:var(--ink);font-weight:600}.nav>a[aria-current=page]:after{right:0}.nav summary::-webkit-details-marker{display:none}.nav summary:after{content:"";width:0;height:0;border:4px solid transparent;border-top-color:currentColor;border-bottom:0;opacity:.6;transition:transform .2s}.navgrp{position:relative}.navgrp[open]>summary,.nav summary[data-active]{color:var(--ink);font-weight:600}.navgrp[open]>summary:after{transform:rotate(180deg)}.sub{position:absolute;top:calc(100% + 12px);right:0;min-width:190px;background:var(--bg);border:1px solid var(--line);border-radius:10px;box-shadow:0 14px 34px #14161e21;padding:7px;display:flex;flex-direction:column;z-index:60}.sub a{color:var(--ink);border:0;font-size:.92rem;font-weight:500;padding:9px 12px;border-radius:7px}.sub a:hover{background:var(--panel)}.sub a[aria-current=page]{color:var(--violet);font-weight:600}.burger{display:none;margin-left:auto;width:42px;height:38px;background:none;border:1px solid var(--line);border-radius:6px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}.burger span{width:20px;height:2px;background:var(--ink);transition:.2s}.burger[aria-expanded=true] span:nth-child(1){transform:translateY(7px) rotate(45deg)}.burger[aria-expanded=true] span:nth-child(2){opacity:0}.burger[aria-expanded=true] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.scrim{position:fixed;inset:0;background:#14161e66;z-index:40}@media(max-width:700px){.burger{display:flex;z-index:70}.nav{position:fixed;inset:0 0 0 auto;width:min(76vw,290px);flex-direction:column;gap:0;background:var(--bg);border-left:1px solid var(--line);padding:72px 18px;z-index:60;transform:translate(100%);transition:transform .22s;margin:0}.nav.open{transform:none;box-shadow:-8px 0 30px #14161e24}.nav>a,.nav summary{font-size:1.05rem;padding:14px 4px;border-bottom:1px solid var(--line);width:100%}.nav>a:after{display:none}.navgrp{position:static;width:100%}.navgrp summary{justify-content:space-between}.navgrp summary:after{margin-left:auto}.sub{position:static;box-shadow:none;border:0;border-radius:0;padding:0;min-width:0}.sub a{padding:13px 4px 13px 20px;border-bottom:1px solid var(--line);font-size:1rem}}main{padding:30px 0 0}h1{font-family:var(--serif);font-weight:700;font-size:clamp(1.85rem,5vw,2.6rem);line-height:1.15;letter-spacing:-.02em;margin:.1em 0 .5em}h2{font-family:var(--serif);font-weight:700;font-size:clamp(1.35rem,3vw,1.65rem);line-height:1.25;margin:2.3em 0 .55em;padding-bottom:.28em;border-bottom:1px solid var(--line)}h3{font-family:var(--serif);font-weight:700;font-size:1.18rem;margin:1.7em 0 .4em}p{margin:0 0 1.1em}ul,ol{margin:0 0 1.2em;padding-left:1.3em}li{margin-bottom:.5em}strong{font-weight:650}.lead{font-size:1.12rem;color:#2c333f}.crumbs{font-size:.85rem;color:var(--muted);margin:0 0 16px}.crumbs a{color:var(--muted);border:0}.crumbs a:hover{color:var(--violet)}.by{display:flex;align-items:center;gap:13px;margin:0 0 26px;padding:13px 16px;background:var(--panel);border-radius:8px}.by-av{flex:0 0 auto;width:38px;height:38px;border-radius:9px;background:linear-gradient(135deg,var(--violet),var(--teal));color:#fff;font-family:var(--serif);font-weight:700;display:grid;place-items:center;font-size:1.1rem}.by p{margin:0;font-size:.88rem;color:var(--muted);line-height:1.45}.by b{color:var(--ink);font-weight:600}.toc{margin:0 0 1.8em;padding:16px 18px;background:var(--panel);border-radius:8px}.toc b{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.09em;color:var(--muted);margin-bottom:9px}.toc ul{margin:0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:7px 16px}.toc li{margin:0}.toc a{color:var(--ink);border:0;font-size:.92rem;display:inline-flex;align-items:center;gap:7px}.toc a:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--violet)}.toc a:hover{color:var(--violet)}.tw{overflow-x:auto;margin:0 0 1.4em}table{border-collapse:collapse;width:100%;font-size:.95rem}th,td{padding:10px 13px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}thead th{font-family:var(--sans);font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;color:var(--violet-d);border-bottom:2px solid var(--violet)}tbody tr:nth-child(odd){background:var(--panel)}table.kv{max-width:420px}table.kv td:first-child{font-weight:600;width:46%}.call{border-left:3px solid var(--teal);background:var(--panel);border-radius:0 8px 8px 0;padding:13px 17px;margin:0 0 1.3em;font-size:.97rem}.call.warn{border-left-color:var(--warn)}details.qa{border-bottom:1px solid var(--line);padding:4px 0}details.qa summary{cursor:pointer;font-family:var(--serif);font-weight:700;font-size:1.05rem;padding:12px 26px 12px 0;position:relative;list-style:none}details.qa summary::-webkit-details-marker{display:none}details.qa summary:after{content:"+";position:absolute;right:2px;top:11px;font-family:var(--sans);font-weight:400;font-size:1.4rem;color:var(--violet);transition:transform .2s}details.qa[open] summary:after{transform:rotate(45deg)}details.qa .qa-a{padding:0 0 8px;color:#2c333f}details.qa .qa-a p{margin:0 0 .6em}figure.shot{margin:1.6em 0;border-radius:10px;overflow:hidden;background:var(--panel)}figure.shot img{display:block;width:100%;height:auto}figure.shot figcaption{padding:9px 15px;font-size:.85rem;color:var(--muted)}.totop{position:fixed;right:20px;bottom:20px;z-index:55;width:46px;height:46px;border-radius:10px;background:var(--violet);color:#fff;border:0;cursor:pointer;font-size:19px;box-shadow:0 6px 18px #6d28d952;opacity:0;visibility:hidden;transition:.2s}.totop.on{opacity:1;visibility:visible}.totop:hover{background:var(--violet-d)}.ftr{margin-top:70px;background:var(--ink);color:#c9cfda}.ftr-in{max-width:860px;margin:0 auto;padding:30px 24px 38px;font-size:.88rem}.ftr-brand{font-family:var(--serif);font-size:1.15rem;color:#fff;margin:0 0 6px}.ftr-brand i{color:#a78bfa;font-style:normal}.ftr a{color:#c9cfda;border-bottom-color:#c9cfda66}.ftr a:hover{color:#fff}.ftr .disc{margin:14px 0 4px;color:#9aa3b2}@media(max-width:560px){body{font-size:16.5px}}@media print{.hdr,.topbar,.ftr,.totop,.burger,.toc{display:none}}