@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-latin-400-normal-DMJ8VG8y.woff2) format("woff2"),url(/assets/ibm-plex-mono-latin-400-normal-CvHOgSBP.woff) format("woff")}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-latin-500-normal-DSY6xOcd.woff2) format("woff2"),url(/assets/ibm-plex-mono-latin-500-normal-CB9ihrfo.woff) format("woff")}:root{--bg: #F6F6F4;--card: #FFFFFF;--line: #ECECE8;--ink: #1C1C1A;--ink-press: #F2F2EE;--sub: #6F6F69;--sub-on-dark: #A5A59D;--on-dark-muted: #C4C4BC;--accent: #2F6B52;--accent-strong: #245541;--accent-soft: #EDF2EF;--hero-num: #9CC7B2;--arrow: #C9C9C2;--warn-ink: #8A6A1F;--font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;--font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--radius-group: 18px;--radius-card: 14px;--radius-conclusion: 16px;--radius-pill: 999px;--shadow-group: 0 1px 2px rgba(20, 20, 15, .04);--shadow-toast: 0 8px 24px rgba(20, 20, 15, .22);--ease: cubic-bezier(.32, .72, .24, 1);--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--gutter-home: 18px;--gutter-tool: 20px;--col: 420px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{background:var(--bg);-webkit-text-size-adjust:100%}body{min-height:100%;background:var(--bg);color:var(--ink);font-family:var(--font-sans);font-size:14px;line-height:1.5;overflow-x:hidden}body.lock{overflow:hidden}#app{min-height:100%}.sprite{display:none}[hidden]{display:none!important}button{font:inherit;color:inherit;background:none;border:0;padding:0;text-align:left;cursor:pointer}input{font:inherit;color:inherit}p,h1,h2{margin:0}.icon{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}.screen{display:flex;flex-direction:column;max-width:var(--col);min-height:100vh;min-height:100dvh;margin:0 auto;padding:0 var(--gutter-home);padding-top:max(22px,var(--safe-top));padding-bottom:max(18px,var(--safe-bottom))}.masthead{padding:20px 4px}.wordmark{font-size:24px;font-weight:800;line-height:1.1;letter-spacing:.02em}.wordmark i{font-style:normal;color:var(--accent)}.masthead .tag{margin-top:4px;font-size:11px;color:var(--sub);letter-spacing:.1em}.groups{display:flex;flex-direction:column;gap:10px}.foot{margin-top:auto;padding-top:22px;font-size:10.5px;line-height:1.8;color:var(--sub);text-align:center}.foot a{color:inherit;font-size:10px;line-height:1.5;letter-spacing:.02em;text-decoration:none}.foot a:hover{text-decoration:underline}.panel{position:fixed;inset:0;z-index:10;overflow:hidden;background:var(--bg)}.panel-enter-from,.panel-leave-to{transform:translateY(100%)}.panel-enter-active,.panel-leave-active{transition:transform .36s var(--ease)}.panel-scroll{position:absolute;inset:0;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}.panel:focus{outline:none}.pi{max-width:var(--col);margin:0 auto;padding:0 var(--gutter-tool) calc(28px + var(--safe-bottom))}.p-top{position:sticky;top:0;z-index:3;display:flex;align-items:center;gap:12px;margin:0 calc(-1 * var(--gutter-tool));padding:max(12px,var(--safe-top)) var(--gutter-tool) 11px;background:var(--bg);border-bottom:1px solid var(--line)}.back{display:flex;align-items:center;gap:6px;min-height:44px;padding-right:10px;font-size:13px;color:var(--sub)}.back svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}.back:active{color:var(--ink)}.p-title{display:flex;align-items:center;gap:13px;padding:22px 0 6px}.p-title .ic{display:flex;flex:none;align-items:center;justify-content:center;width:50px;height:50px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card)}.p-title .ic .icon{width:26px;height:26px}.p-title .nm{font-size:21px;font-weight:800;line-height:1.3}.p-title .desc{margin-top:2px;font-size:11.5px;color:var(--sub)}.toast{position:fixed;left:50%;bottom:calc(28px + var(--safe-bottom));z-index:30;max-width:calc(100vw - 40px);padding:12px 20px;font-size:13px;color:var(--bg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;background:var(--ink);border-radius:var(--radius-pill);box-shadow:var(--shadow-toast);opacity:0;pointer-events:none;transform:translate(-50%,12px);transition:opacity .25s ease,transform .25s ease}.toast.show{opacity:1;transform:translate(-50%)}.group{display:flex;flex-direction:column}.g-head-h{margin:0;font:inherit}.g-head{display:flex;align-items:center;gap:9px;min-height:44px;padding:10px 6px;user-select:none}.g-head .t{font-size:13.5px;font-weight:700;color:var(--sub);transition:color .2s}.group.open .g-head .t{color:var(--ink)}.g-head .c{flex:1;font-size:10.5px;color:var(--sub)}.chev{width:16px;height:16px;fill:none;stroke:var(--sub);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .28s var(--ease)}.group.open .chev{transform:rotate(180deg)}.g-body{display:grid;grid-template-rows:0fr;opacity:0;overflow:hidden;background:var(--card);border-radius:var(--radius-group);box-shadow:var(--shadow-group);transition:grid-template-rows .3s var(--ease),opacity .2s ease}.group.open .g-body{grid-template-rows:1fr;opacity:1}.g-inner{min-height:0;overflow:hidden;transition:visibility 0s}.group:not(.open) .g-inner{visibility:hidden;transition:visibility 0s .3s}.g-item{display:flex;align-items:center;gap:13px;width:100%;min-height:66px;padding:14px 16px;transition:background .1s}.g-item+.g-item{border-top:1px solid var(--line)}.g-item:active{background:var(--ink-press)}.g-item .ic{display:flex;flex:none;align-items:center;justify-content:center;width:38px;height:38px;background:var(--bg);border-radius:11px}.g-item .tx{display:flex;flex:1;flex-direction:column;min-width:0}.g-item .nm{font-size:14.5px;font-weight:600}.g-item .desc{margin-top:2px;font-size:11.5px;color:var(--sub)}.g-item .arr{font-size:17px;color:var(--arrow)}.sec{margin:22px 4px 8px;font-size:11px;font-weight:700;letter-spacing:.06em;color:var(--sub)}.card{padding:14px 16px;background:var(--card);border-radius:var(--radius-card)}.purpose{font-size:13.5px;line-height:1.85}.purpose b{font-weight:600}.seg{display:flex;flex:1;gap:2px;padding:3px;background:var(--card);border-radius:var(--radius-pill)}.seg-btn{display:flex;flex:1;align-items:center;justify-content:center;min-height:34px;padding:7px 0;font-size:12px;color:var(--sub);text-align:center;border-radius:var(--radius-pill);transition:.15s}.seg-btn.on{font-weight:600;color:#fff;background:var(--ink)}.param-wrap{overflow:hidden;background:var(--card);border-radius:var(--radius-card)}.param-cell+.param-cell{border-top:1px solid var(--line)}.param{display:flex;align-items:center;gap:10px;min-height:50px;padding:10px 16px}.param .lb{display:flex;flex:1;align-items:center;gap:6px;min-width:0;font-size:14px;font-weight:500}.qmark{position:relative;display:inline-flex;flex:none;align-items:center;justify-content:center;width:22px;height:22px;font-family:var(--font-mono);font-size:10px;color:var(--sub);background:var(--bg);border-radius:50%}.qmark:after{content:"";position:absolute;inset:-11px}.qmark[aria-expanded=true]{color:var(--accent-strong);background:var(--accent-soft)}.param input{width:84px;padding:6px 8px;font-family:var(--font-mono);font-size:16px;text-align:right;color:var(--ink);background:var(--bg);border:0;border-radius:8px;outline:none}.param input:focus{box-shadow:inset 0 0 0 1.5px var(--accent)}.param input[aria-invalid=true]{box-shadow:inset 0 0 0 1.5px var(--warn-ink)}.param .unit{width:38px;font-family:var(--font-mono);font-size:10px;color:var(--sub);text-align:right}.param .seg-choice{flex:0 0 168px}.param .seg-choice .seg-btn{min-height:30px;padding:5px 0;font-size:12px}.param-error{padding:0 16px 10px;font-size:11.5px;color:var(--warn-ink)}.param-cell.invalid{background:#fdfbf4}.hints{display:block}.hint{margin:8px 0;padding:11px 13px;font-size:12.5px;line-height:1.75;color:var(--ink);background:var(--accent-soft);border-radius:12px;animation:hint-in .2s ease}.hint .k{display:block;margin-bottom:3px;font-size:10.5px;font-weight:700;color:var(--accent-strong)}@keyframes hint-in{0%{opacity:0;transform:translateY(-3px)}to{opacity:1;transform:none}}.run{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;height:52px;margin:24px 0 0;font-size:15px;font-weight:700;letter-spacing:.04em;color:#fff;text-align:center;background:var(--ink);border-radius:var(--radius-pill)}.run:not(:disabled):active{transform:scale(.985)}.run:disabled{cursor:default;opacity:.88}.run-spin{width:14px;height:14px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:run-spin .72s linear infinite}@keyframes run-spin{to{transform:rotate(360deg)}}.sec-row{display:flex;align-items:baseline;justify-content:space-between;gap:10px}.sec-act{padding:0 4px;font-size:11px;color:var(--sub);text-decoration:underline;text-underline-offset:3px}.sec-act:hover{color:var(--ink)}.result .sec:first-child{margin-top:26px}.res-main{padding:20px;color:var(--bg);background:var(--ink);border-radius:var(--radius-conclusion);animation:result-in .4s var(--ease)}@keyframes result-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.calc-busy{display:flex;flex-direction:column;min-height:200px}.cb-head{display:flex;align-items:center;gap:8px;margin-top:auto}.cb-label{font-size:20px;font-weight:700;color:#fff}.cb-dots{display:inline-flex;gap:4px}.cb-dots i{width:4px;height:4px;background:var(--hero-num);border-radius:50%;animation:cb-dot 1.05s infinite}.cb-dots i:nth-child(2){animation-delay:.14s}.cb-dots i:nth-child(3){animation-delay:.28s}@keyframes cb-dot{0%,70%,to{opacity:.28;transform:translateY(0)}35%{opacity:1;transform:translateY(-2px)}}.cb-track{height:2px;margin-top:16px;overflow:hidden;background:#ffffff29;border-radius:2px}.cb-track i{display:block;width:100%;height:100%;background:var(--hero-num);transform-origin:left center;animation:cb-fill var(--solve-ms, .72s) cubic-bezier(.25,.7,.3,1) forwards}@keyframes cb-fill{0%{transform:scaleX(0)}to{transform:scaleX(1)}}.cb-step{margin-top:12px;font-family:var(--font-mono);font-size:11px;color:var(--sub-on-dark)}@media(prefers-reduced-motion:reduce){.run-spin,.cb-dots i,.cb-track i{animation:none}}.res-main .cap{margin-bottom:12px;font-size:10.5px;color:var(--sub-on-dark)}.res-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:6px 0}.res-row .k{flex:none;font-size:13px;color:var(--on-dark-muted)}.res-row .v{font-family:var(--font-mono);font-size:20px;color:#fff;white-space:nowrap}.res-row .v .u{margin-left:4px;font-size:10px;color:var(--sub-on-dark)}.res-row.hero .v{font-size:32px;color:var(--hero-num)}.res-row.text .v{font-family:var(--font-sans);font-size:14px;line-height:1.45;color:#fff;text-align:right;white-space:normal}noscript p{max-width:420px;margin:0 auto;padding:16px 20px calc(16px + var(--safe-bottom));font-size:11px;line-height:1.8;color:var(--sub);text-align:center}.p-foot{margin-top:28px;font-size:10.5px;color:var(--sub);text-align:center}#result{scroll-margin-top:76px}