:root{--asphalt: #2e3a46;--asphalt-2: #25303a;--asphalt-3: #3a4855;--paper: #f7f3ea;--paper-2: #efe9dc;--card: #fffdf8;--ink: #1f2830;--ink-2: #4a5661;--ink-3: #6b7680;--line: #ddd4c2;--line-2: #e9e2d3;--lane: #f2c14e;--lane-deep: #b98512;--lane-soft: rgba(242, 193, 78, .16);--stripe: #fbfaf5;--go: #2f5f7a;--go-soft: #e6eef2;--caution: #a8700c;--caution-soft: #f8eed7;--stop: #a8412c;--stop-soft: #f6e4de;--r-sm: 8px;--r: 14px;--r-lg: 20px;--sh-1: 0 1px 2px rgba(31, 40, 48, .06), 0 4px 14px rgba(31, 40, 48, .05);--sh-2: 0 2px 6px rgba(31, 40, 48, .07), 0 18px 40px rgba(31, 40, 48, .09);--ease: cubic-bezier(.22, .61, .36, 1);--sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, -apple-system, sans-serif;--num: "DIN Alternate", "Bahnschrift", "Avenir Next Condensed", "Helvetica Neue", var(--sans);--shell: 1160px;color-scheme:light}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.72;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto}a{color:var(--go);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:var(--asphalt)}:focus-visible{outline:2px solid var(--lane-deep);outline-offset:2px;border-radius:4px}h1,h2,h3,h4{font-weight:600;letter-spacing:-.02em;line-height:1.3;color:var(--ink);margin:0}p{margin:0 0 .9em}.shell{width:min(100% - 32px,var(--shell));margin-inline:auto}.skip{position:absolute;left:-999px;top:8px;background:var(--card);padding:8px 12px;border-radius:var(--r-sm);z-index:50}.skip:focus{left:16px}.mast{background:var(--asphalt);color:#fff;position:sticky;top:0;z-index:20}.mast:after{content:"";display:block;height:3px;background:repeating-linear-gradient(90deg,var(--lane) 0 26px,transparent 26px 44px);opacity:.9}.mast .shell{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:62px}.logo{display:flex;align-items:center;gap:11px;color:#fff;text-decoration:none;min-width:0}.logo img{width:32px;height:32px;border-radius:9px;flex:none}.logo span{display:flex;flex-direction:column;font-weight:600;font-size:16px;line-height:1.2;letter-spacing:.01em;white-space:nowrap}.logo small{font:500 10.5px/1.3 var(--num);letter-spacing:.16em;color:#c3ccd4}.nav{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}.nav a{color:#dfe5ea;text-decoration:none;font-size:14.5px;padding:7px 11px;border-radius:999px;transition:background .2s var(--ease),color .2s var(--ease)}.nav a:hover{background:#ffffff14;color:#fff}.nav a[aria-current=page]{color:#fff;background:#f2c14e29;box-shadow:inset 0 -2px 0 var(--lane);border-radius:8px 8px 2px 2px}.lanes{height:10px;position:relative;margin-block:0;border:0}.lanes:before,.lanes:after{content:"";position:absolute;left:0;right:0;height:2px}.lanes:before{top:0;background:var(--line)}.lanes:after{top:7px;background:repeating-linear-gradient(90deg,var(--lane) 0 22px,transparent 22px 38px)}.plate{display:inline-flex;align-items:center;gap:6px;background:var(--asphalt);color:#fff;font-size:12.5px;font-weight:500;letter-spacing:.08em;padding:4px 10px 4px 9px;border-radius:6px;box-shadow:inset 0 0 0 1px #ffffff8c,inset 0 0 0 3px var(--asphalt)}.plate i{font-style:normal;font:600 11px/1 var(--num);color:var(--lane);letter-spacing:.1em}.eyebrow{font-size:13px;letter-spacing:.14em;color:var(--ink-3);margin:0 0 12px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.hero{padding:44px 0 30px}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.22fr);gap:40px;align-items:start}.hero h1{font-size:clamp(30px,4.2vw,44px);letter-spacing:-.03em;margin-bottom:16px}.hero h1 em{font-style:normal;background:linear-gradient(transparent 70%,var(--lane-soft) 70%);box-shadow:inset 0 -2px 0 var(--lane)}.lead{font-size:17px;color:var(--ink-2);max-width:34em}.premise{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:10px}.premise li{display:grid;grid-template-columns:30px 1fr;gap:12px;align-items:start;background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:13px 15px;box-shadow:var(--sh-1)}.premise b{font:600 15px/1 var(--num);color:var(--asphalt);width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--paper-2);box-shadow:inset 0 0 0 1.5px var(--lane)}.premise span{font-size:14.5px;color:var(--ink-2);line-height:1.6}.premise strong{color:var(--ink);font-weight:600}.tool{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r-lg);box-shadow:var(--sh-2);overflow:hidden}.tabs{display:grid;grid-template-columns:1fr 1fr;background:var(--asphalt);position:relative}.tabs button{appearance:none;border:0;background:transparent;color:#c9d2da;font:600 15px/1.3 var(--sans);padding:15px 12px 13px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px;transition:color .2s var(--ease),background .2s var(--ease)}.tabs button small{font-size:12px;font-weight:400;color:#9fabb6}.tabs button[aria-selected=true]{color:#fff;background:var(--asphalt-3);box-shadow:inset 0 -3px 0 var(--lane)}.tabs button:hover{color:#fff}.panel{padding:22px 22px 24px}.panel[hidden]{display:none}.field{margin-bottom:16px}.label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px;letter-spacing:.02em}.label small{font-weight:400;color:var(--ink-3);margin-left:6px}select,input[type=date],input[type=number]{width:100%;font:15.5px/1.4 var(--sans);color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px 12px;min-height:46px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}select:focus,input:focus{border-color:var(--asphalt-3);box-shadow:0 0 0 3px #f2c14e47;outline:none}.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.seg{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.seg input{position:absolute;opacity:0;pointer-events:none}.seg label{display:block;border:1px solid var(--line);border-radius:10px;padding:9px 12px;cursor:pointer;background:#fff;min-height:44px;transition:border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease)}.seg label b{display:block;font-weight:600;font-size:14.5px}.seg label small{display:block;font-size:12px;color:var(--ink-3);line-height:1.4}.seg label:hover{border-color:var(--asphalt-3);transform:translateY(-1px)}.seg input:checked+label{border-color:var(--asphalt);background:var(--paper);box-shadow:inset 3px 0 0 var(--lane)}.seg input:focus-visible+label{outline:2px solid var(--lane-deep);outline-offset:2px}.hint{font-size:12.5px;color:var(--ink-3);margin:6px 0 0}.out{margin-top:18px}.res{border-radius:var(--r);border:1px solid var(--line-2);background:var(--paper);padding:16px 16px 14px;animation:rise .35s var(--ease)}@keyframes rise{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.sign{display:grid;grid-template-columns:auto 1fr;column-gap:12px;align-items:center;background:var(--asphalt);color:#fff;border-radius:10px;padding:12px 14px;box-shadow:inset 0 0 0 1px #ffffff59,inset 0 0 0 4px var(--asphalt)}.sign-k{grid-row:span 2;font:600 13px/1 var(--num);letter-spacing:.08em;background:var(--lane);color:var(--asphalt-2);border-radius:6px;padding:7px 8px;min-width:44px;text-align:center}.sign strong{font-size:17px;font-weight:600;letter-spacing:-.01em}.sign-sub{font-size:12.5px;color:#c3ccd4}.res-stop .sign-k{background:#f3d2c9;color:var(--stop)}.res-caution .sign-k{background:#f7e3b3;color:#7a5208}.res-none .sign-k{background:#dfe4e8;color:var(--asphalt)}.headline{margin:12px 2px 4px;font-size:15px;color:var(--ink-2)}.res h4{font-size:13px;letter-spacing:.1em;color:var(--ink-3);font-weight:600;margin:16px 0 7px}.res p{font-size:14.5px}.km{display:grid;grid-template-columns:150px 1fr;gap:14px;align-items:center;margin-top:14px}.post{background:#fff;border-radius:12px 12px 6px 6px;border:1px solid var(--line);border-top:6px solid var(--lane);text-align:center;padding:9px 8px 8px;box-shadow:var(--sh-1)}.post small{display:block;font-size:11.5px;color:var(--ink-3);line-height:1.4}.post b{display:block;font:600 17px/1.3 var(--num);color:var(--asphalt);margin:2px 0;letter-spacing:.01em}.km p{margin:0;display:flex;flex-direction:column;gap:4px}.km em{font-style:normal;font-weight:600;font-size:14.5px}.km em.ok{color:var(--go)}.km em.over{color:var(--stop)}.fine{font-size:12.5px;color:var(--ink-3)}.checks,.steps,.plain{margin:0;padding:0;list-style:none;display:grid;gap:7px}.checks li,.steps li,.plain li{position:relative;padding-left:22px;font-size:14.5px;line-height:1.6}.checks li:before{content:"";position:absolute;left:2px;top:.5em;width:11px;height:11px;border-radius:3px;border:1.5px solid var(--asphalt-3);background:#fff}.steps{counter-reset:s}.steps li{counter-increment:s;padding-left:28px}.steps li:before{content:counter(s);position:absolute;left:0;top:.18em;width:19px;height:19px;border-radius:50%;background:var(--asphalt);color:#fff;font:600 11px/19px var(--num);text-align:center}.plain li:before{content:"";position:absolute;left:4px;top:.72em;width:10px;height:2px;background:var(--lane-deep)}.note{background:var(--card);border-left:3px solid var(--line);padding:8px 11px;border-radius:0 8px 8px 0;color:var(--ink-2);font-size:14px;margin:10px 0 0}.note-d{border-left-color:var(--lane)}.note-d b,.tag-d{font-size:11.5px;font-weight:600;color:#7a5208;background:var(--lane-soft);border:1px solid rgba(185,133,18,.35);border-radius:4px;padding:0 5px;margin-right:7px;white-space:nowrap}.tag-d{margin:0 0 0 6px}.basis{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:14px;padding-top:10px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--ink-3)}.chips{display:inline-flex;flex-wrap:wrap;gap:4px;vertical-align:1px}.chip{font:600 11px/1 var(--num);letter-spacing:.04em;color:var(--asphalt);background:#fff;border:1px solid var(--line);border-radius:4px;padding:4px 5px 3px;text-decoration:none;transition:background .15s var(--ease)}.chip:hover{background:var(--asphalt);color:#fff}.chip-d{border-style:dashed;border-color:var(--lane-deep);color:#7a5208}.band{padding:54px 0}.band-alt{background:var(--paper-2)}.sec-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:22px;flex-wrap:wrap}.sec-head h2{font-size:clamp(22px,2.6vw,28px)}.sec-head p{color:var(--ink-2);margin:6px 0 0;max-width:40em}.matrix-wrap{overflow-x:auto;border-radius:var(--r);border:1px solid var(--line-2);background:var(--card);box-shadow:var(--sh-1)}.matrix{width:100%;border-collapse:collapse;font-size:14px;min-width:640px}.matrix th,.matrix td{padding:11px 12px;border-bottom:1px solid var(--line-2);text-align:left;vertical-align:top}.matrix thead th{background:var(--asphalt);color:#fff;font-weight:600;font-size:13px;letter-spacing:.04em;position:sticky;top:0}.matrix tbody tr:hover{background:var(--paper)}.matrix th[scope=row]{font-weight:600;white-space:nowrap;position:sticky;left:0;background:var(--card);z-index:1;box-shadow:1px 0 0 var(--line-2)}.matrix tbody tr:hover th[scope=row]{background:var(--paper)}.matrix th[scope=row] small{display:block;font:500 11px/1.3 var(--num);color:var(--ink-3);letter-spacing:.1em}.v{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;white-space:nowrap}.v:before{content:"";width:9px;height:9px;border-radius:50%;flex:none}.v-window:before,.v-open:before{background:var(--go)}.v-no:before{background:var(--stop)}.v-varies:before,.v-unstated:before{background:#fff;border:1.5px solid var(--ink-3)}.v b{font:600 13.5px/1 var(--num);color:var(--asphalt)}.legend{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--ink-2);margin-top:12px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.card{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:20px;box-shadow:var(--sh-1);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}.card h3{font-size:17px;margin-bottom:8px}.card p{color:var(--ink-2);font-size:14.5px;margin:0}.stat{font:600 34px/1 var(--num);color:var(--asphalt);letter-spacing:-.01em;margin-bottom:10px;display:flex;align-items:baseline;gap:6px}.stat small{font:500 14px var(--sans);color:var(--ink-3)}.card .top-line{height:3px;width:44px;background:var(--lane);border-radius:2px;margin-bottom:14px}a.card{text-decoration:none;color:inherit;display:block}a.card .more{display:inline-block;margin-top:12px;font-size:14px;color:var(--go);font-weight:600}.page-head{padding:40px 0 22px}.page-head h1{font-size:clamp(26px,3.4vw,36px);letter-spacing:-.03em;margin:8px 0 10px}.page-head .lead{font-size:16px}.breadcrumb{font-size:13px;color:var(--ink-3)}.breadcrumb a{color:var(--ink-2);text-decoration:none}.article-meta{font-size:13.5px;color:var(--ink-3);margin:0}.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:40px;padding-bottom:50px}.prose{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r-lg);padding:30px 34px;box-shadow:var(--sh-1);min-width:0}.prose h2{font-size:21px;margin:30px 0 12px;padding-top:16px;border-top:1px dashed var(--line)}.prose h2:first-child{margin-top:0;padding-top:0;border-top:0}.prose p,.prose li{font-size:16px;color:#2b3540}.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1em}.prose li{margin:4px 0}.prose blockquote{margin:14px 0;padding:10px 16px;border-left:3px solid var(--lane);background:var(--paper);border-radius:0 10px 10px 0;color:var(--ink-2);font-size:15px}.prose table{width:100%;border-collapse:collapse;font-size:14.5px;margin:10px 0 18px;display:block;overflow-x:auto}.prose th,.prose td{border-bottom:1px solid var(--line-2);padding:8px 10px;text-align:left;vertical-align:top}.prose th{background:var(--paper-2);font-weight:600;white-space:nowrap}.prose .src{font-size:13.5px;color:var(--ink-3)}.aside-box{position:sticky;top:90px;background:var(--asphalt);color:#dfe5ea;border-radius:var(--r-lg);padding:22px;box-shadow:var(--sh-2)}.aside-box h2{color:#fff;font-size:17px;margin-bottom:10px}.aside-box ol{margin:0 0 16px;padding-left:1.2em;font-size:14.5px}.aside-box:before{content:"";display:block;height:3px;width:100%;margin-bottom:16px;background:repeating-linear-gradient(90deg,var(--lane) 0 18px,transparent 18px 30px)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 20px;border-radius:10px;background:var(--lane);color:var(--asphalt-2);font-weight:600;font-size:15px;text-decoration:none;border:0;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);box-shadow:0 1px #0000001f}.btn:hover{transform:translateY(-1px);background:#f5cd6b;color:var(--asphalt-2);box-shadow:0 8px 18px #1f28302e}.btn-ghost{background:transparent;color:var(--asphalt);box-shadow:inset 0 0 0 1px var(--line)}.btn-ghost:hover{background:var(--card);color:var(--asphalt)}.rule-group{margin-bottom:40px}.rule-group>h2{font-size:22px;margin-bottom:6px}.rule-group>p{color:var(--ink-2)}.rule{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:16px 18px;margin-top:12px;box-shadow:var(--sh-1);scroll-margin-top:90px}.rule:target{box-shadow:0 0 0 2px var(--lane),var(--sh-2)}.rule header{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap;margin-bottom:6px}.rule .rid{font:600 12px/1 var(--num);letter-spacing:.06em;background:var(--asphalt);color:#fff;border-radius:5px;padding:5px 7px 4px}.rule.derived .rid{background:var(--lane);color:var(--asphalt-2)}.rule h3{font-size:16px}.rule p{font-size:14.5px;color:var(--ink-2);margin:0 0 8px}.rule blockquote{margin:8px 0;padding:8px 12px;background:var(--paper);border-left:3px solid var(--asphalt-3);border-radius:0 8px 8px 0;font-size:14px;color:var(--ink);overflow-wrap:anywhere}.rule .meta{font-size:13px;color:var(--ink-3);overflow-wrap:anywhere}.toc{display:flex;gap:8px;flex-wrap:wrap;margin:4px 0 28px}.support{margin-top:10px;margin-bottom:50px}.support .inner{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r-lg);padding:22px 24px;display:flex;justify-content:space-between;align-items:center;gap:20px;box-shadow:var(--sh-1);position:relative;overflow:hidden}.support .inner:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:repeating-linear-gradient(180deg,var(--lane) 0 14px,transparent 14px 24px)}.support h2{font-size:18px;margin-bottom:4px}.support p{margin:0;color:var(--ink-2);font-size:14.5px}.support .btn{background:var(--asphalt);color:#fff;flex:none}.support .btn:hover{background:var(--asphalt-3);color:#fff}.footer{background:var(--asphalt-2);color:#c3ccd4;padding:0 0 26px}.footer:before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--lane) 0 100%);opacity:.85;margin-bottom:36px;box-shadow:0 5px 0 -1px var(--asphalt-2),0 6px #fbfaf540}.footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}.footer h2{color:#fff;font-size:15px;margin-bottom:10px}.footer p{font-size:14px;line-height:1.7}.footer ul{list-style:none;margin:0;padding:0;display:grid;gap:6px;font-size:14px}.footer a{color:#dfe5ea;text-decoration:none}.footer a:hover{color:var(--lane)}.footer .fine{color:#95a2ad;border-top:1px dashed rgba(255,255,255,.16);padding-top:16px;margin-top:26px;font-size:12.5px}.reveal{opacity:0;transform:translateY(10px);transition:opacity .5s var(--ease),transform .5s var(--ease)}.reveal.in,.no-js .reveal{opacity:1;transform:none}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}@media(max-width:960px){.hero-grid{grid-template-columns:minmax(0,1fr);gap:26px}.article-wrap{grid-template-columns:minmax(0,1fr)}.aside-box{position:static}.cards{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}@media(max-width:640px){.mast .shell{flex-direction:column;align-items:flex-start;gap:4px;padding:10px 0 8px;min-height:0}.nav{justify-content:flex-start;margin-left:-10px;gap:0}.nav a{font-size:14px;padding:6px 10px}.mast{position:static}.hero{padding-top:28px}.panel{padding:18px 16px 20px}.pair,.seg,.km{grid-template-columns:minmax(0,1fr)}.post{max-width:220px}.cards{grid-template-columns:minmax(0,1fr)}.prose{padding:22px 18px}.support .inner{flex-direction:column;align-items:flex-start}.footer .cols{grid-template-columns:minmax(0,1fr);gap:22px}.band{padding:40px 0}}
