:root{
  --paper:#f6f3ec; --paper-2:#efeae0; --ink:#232220; --ink-2:#5c5954; --ink-3:#8f8b83;
  --line:#d9d3c6; --seal:#a4392b; --moss:#4f6b4f;
  --serif:"Songti SC","STSong","Noto Serif SC","Noto Serif CJK SC","Source Han Serif SC",Georgia,"Times New Roman",serif;
}
*{box-sizing:border-box}
html{background:var(--paper)}
body{margin:0;color:var(--ink);font-family:var(--serif);font-size:17px;line-height:1.85;-webkit-font-smoothing:antialiased}
.page{max-width:680px;margin:0 auto;padding:64px 22px 80px}
h1,h2,h3{font-weight:500;letter-spacing:.04em}
a{color:inherit}
[hidden]{display:none!important}

.hero{text-align:center;margin-bottom:56px}
.hero h1{font-size:40px;margin:14px 0 8px}
.sub{color:var(--ink-2);margin:0}
.sub2{color:var(--ink-3);font-size:14px;letter-spacing:.12em;margin:14px 0 0}
.enso{width:64px;height:64px;display:block;margin:0 auto}
.enso path{fill:none;stroke:var(--ink);stroke-width:5;stroke-linecap:round;opacity:.85}
.breathing{animation:turn 12s linear infinite;transform-box:fill-box;transform-origin:center;will-change:transform}
.breathing path{animation:breathe 3.6s ease-in-out infinite}
@keyframes turn{to{transform:rotate(360deg)}}
@keyframes breathe{0%,100%{opacity:.25;stroke-width:4}50%{opacity:.9;stroke-width:6}}

.lbl{display:block;color:var(--ink-2);font-size:15px;letter-spacing:.1em;margin-bottom:8px}
textarea{width:100%;font:inherit;color:var(--ink);background:transparent;border:0;border-bottom:1px solid var(--line);padding:10px 0 14px;resize:vertical;outline:none;line-height:1.8}
textarea:focus{border-bottom-color:var(--ink)}
textarea::placeholder{color:var(--ink-3)}
.row{display:flex;justify-content:space-between;align-items:center;margin-top:14px}
.count{color:var(--ink-3);font-size:13px;letter-spacing:.05em}
.btn{font:inherit;font-size:17px;letter-spacing:.3em;padding:8px 22px 8px 26px;background:transparent;color:var(--ink);border:1px solid var(--ink);border-radius:999px;cursor:pointer;transition:background .25s,color .25s}
.btn:hover{background:var(--ink);color:var(--paper)}
.btn:disabled{opacity:.4;cursor:default}
.chips{margin-top:34px;display:flex;flex-direction:column;gap:16px}
.chips-intro{text-align:center;color:var(--ink-3);font-size:13px;letter-spacing:.1em}
.chipgroup{display:flex;flex-wrap:wrap;gap:8px 10px;justify-content:center;align-items:center}
.chiplbl{flex-basis:100%;text-align:center;color:var(--ink-3);font-size:12px;letter-spacing:.2em}
.chip{font:inherit;font-size:14px;color:var(--ink-2);background:transparent;border:1px solid var(--line);border-radius:999px;padding:3px 13px;cursor:pointer;transition:all .2s}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}

.wait{text-align:center;margin:36px 0 8px}
.wait p{margin:14px 0 0;color:var(--ink-2)}
.wait .hint{color:var(--ink-3);font-size:14px}

.result{margin-top:56px;animation:rise .6s ease-out}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.subject{color:var(--ink-3);font-size:13px;letter-spacing:.2em;text-align:center}
.subject .tag{margin-left:8px;color:var(--seal);border:1px solid var(--seal);border-radius:3px;padding:0 5px;font-size:12px}
.headline{font-size:24px;line-height:1.7;text-align:center;margin:12px 0 6px}
.overall{text-align:center;color:var(--ink-2);margin:0 0 8px}
.overall b{color:var(--ink);font-weight:500}
.overall .note{color:var(--ink-3);font-size:14px}
.price{text-align:center;color:var(--seal);font-size:15px;margin:0}

.sec{margin-top:48px}
.sec h2{font-size:15px;letter-spacing:.25em;color:var(--ink-2);margin:0 0 18px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.unit{padding:14px 0;border-bottom:1px dashed var(--line)}
.unit:last-child{border-bottom:0}
.u-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.u-name{font-size:18px}
.u-name .share{color:var(--ink-3);font-size:13px;margin-left:8px}
.u-months{white-space:nowrap;font-size:15px}
.u-months small{color:var(--ink-3);font-size:13px;margin-left:4px}
.u-months.keep{color:var(--moss)}
.bar{position:relative;height:2px;background:var(--line);margin:10px 0 8px}
.bar i{position:absolute;left:0;top:-1px;height:4px;background:var(--ink);border-radius:2px}
.bar i.keep{background:var(--moss)}
.bar .dot{position:absolute;top:-4px;width:10px;height:10px;border-radius:50%;background:var(--paper);border:2px solid var(--ink);transform:translateX(-50%)}
.bar .dot.keep{border-color:var(--moss)}
.bar .rng{position:absolute;top:0;height:2px;background:var(--ink-3);opacity:.6}
.u-why{color:var(--ink-2);font-size:15px;margin:0}
.tagp{display:inline-block;font-size:12px;color:var(--ink-3);border:1px solid var(--line);border-radius:3px;padding:0 5px;margin-right:8px;vertical-align:1px}
.legend{display:flex;gap:18px;color:var(--ink-3);font-size:13px;margin-top:10px;justify-content:flex-end}
.legend i{display:inline-block;width:14px;height:3px;vertical-align:middle;margin-right:6px;background:var(--ink)}
.legend i.keep{background:var(--moss)}

.keep-item{margin:0 0 14px}
.keep-item b{font-weight:500}
.keep-item p{margin:2px 0 0;color:var(--ink-2);font-size:15px}

.dir{display:grid;grid-template-columns:96px 1fr;gap:6px 18px;padding:16px 0;border-bottom:1px dashed var(--line)}
.dir:last-child{border-bottom:0}
.dir .win{color:var(--seal);font-size:14px;letter-spacing:.05em;padding-top:3px}
.dir h3{margin:0;font-size:18px}
.dir p{margin:4px 0 0;color:var(--ink-2);font-size:15px}
.dir p.why{color:var(--ink-3);font-size:14px}

.signals{margin:0;padding-left:1.2em;color:var(--ink-2)}
.signals li{margin-bottom:6px}
.closing{text-align:center;color:var(--ink-2);margin:56px 0 0;font-size:18px}
.closing::before{content:"—";display:block;color:var(--ink-3);margin-bottom:12px}
.again{text-align:center;margin-top:28px}
.again button{font:inherit;font-size:14px;letter-spacing:.15em;background:none;border:0;color:var(--ink-3);cursor:pointer;text-decoration:underline;text-underline-offset:4px}

.assump{margin-top:40px;font-size:14px;color:var(--ink-3)}
.assump summary{cursor:pointer;letter-spacing:.1em;list-style:none}
.assump summary::-webkit-details-marker{display:none}
.assump summary::after{content:" ＋";}
.assump[open] summary::after{content:" －";}
.assump ul{padding-left:1.2em;margin:8px 0}
.assump p{margin:8px 0}

.error{text-align:center;color:var(--seal);margin:40px 0}

.foot{margin-top:96px;border-top:1px solid var(--line);padding-top:24px;color:var(--ink-2);font-size:15px}
.method summary{cursor:pointer;letter-spacing:.15em;list-style:none;color:var(--ink-2)}
.method summary::-webkit-details-marker{display:none}
.method summary::before{content:"◯ ";color:var(--ink-3)}
.method-body{margin-top:14px;color:var(--ink-2)}
.method-body p{margin:0 0 12px}
.method-body h3{font-size:15px;letter-spacing:.2em;color:var(--ink);margin:30px 0 12px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.method-body h3:first-child{margin-top:4px}
.method-body strong{color:var(--ink);font-weight:500}
.tablewrap{overflow-x:auto;margin:4px 0 6px}
.hist{border-collapse:collapse;width:100%;font-size:14px;line-height:1.6}
.hist th{font-weight:500;color:var(--ink-3);letter-spacing:.1em;text-align:left;padding:6px 10px 6px 0;border-bottom:1px solid var(--line)}
.hist td{padding:6px 10px 6px 0;border-bottom:1px dashed var(--line);white-space:nowrap}
.hist td:nth-child(3){color:var(--ink);font-variant-numeric:tabular-nums}
.src{color:var(--ink-3);font-size:13px}
.fine{color:var(--ink-3);font-size:13px;margin-top:22px;text-align:center;letter-spacing:.05em}
.fine a{color:inherit;text-decoration:underline;text-underline-offset:5px;text-decoration-color:var(--line);transition:color .2s,text-decoration-color .2s}
.fine a:hover{color:var(--ink-2);text-decoration-color:var(--ink-2)}

@media (max-width:560px){
  .page{padding:44px 18px 60px}
  .hero h1{font-size:32px}
  .headline{font-size:21px}
  .dir{grid-template-columns:1fr;gap:2px}
  .u-head{flex-direction:column;gap:2px}
}

.credits{margin-top:48px;padding-top:22px;border-top:1px solid var(--line);color:var(--ink-3);font-size:13px;line-height:1.8;text-align:center}
.credits h4{font-weight:500;font-size:12px;letter-spacing:.25em;color:var(--ink-3);margin:0 0 10px}
.credits p{margin:0 0 6px}
.credits .who{color:var(--ink-2)}
.credits .role{display:block}
.credits .copy{margin-top:14px;letter-spacing:.05em}

.kbd{color:var(--ink-3);font-size:12px}
.hint-msg{color:var(--seal);font-size:14px;margin:10px 0 0;text-align:right}
.btn.busy{min-width:88px;cursor:progress;opacity:.7}
.dots{display:inline-flex;gap:6px;align-items:center;height:1em;vertical-align:middle}
.dots i{width:6px;height:6px;border-radius:50%;background:currentColor;animation:pulse 1.4s ease-in-out infinite}
.dots i:nth-child(2){animation-delay:.2s}.dots i:nth-child(3){animation-delay:.4s}
@keyframes pulse{0%,80%,100%{opacity:.2;transform:scale(.8)}40%{opacity:1;transform:scale(1)}}
#elapsed{margin-left:8px}
@media (max-width:560px){.kbd{display:none}}

/* 语言切换 */
.langbar{display:flex;justify-content:flex-end;margin:-28px 0 12px}
.langsel{display:inline-flex;align-items:center;gap:6px;color:var(--ink-3);font-size:13px}
.langsel select{font:inherit;font-size:13px;color:var(--ink-2);background:transparent;border:0;border-bottom:1px solid var(--line);padding:2px 0;cursor:pointer;outline:none;letter-spacing:.05em}
.langsel select:focus{border-bottom-color:var(--ink)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
/* 下载 */
.download{margin-top:48px;padding-top:22px;border-top:1px solid var(--line);text-align:center;color:var(--ink-2);font-size:15px}
.download h4{font-weight:500;font-size:12px;letter-spacing:.25em;color:var(--ink-3);margin:0 0 10px}
.download p{margin:0 0 10px}
.download .how{color:var(--ink-3);font-size:13px}
.btn.small{display:inline-block;font-size:14px;letter-spacing:.12em;padding:6px 18px;text-decoration:none}
/* RTL */
[dir="rtl"] .dir{direction:rtl}
[dir="rtl"] .hist th,[dir="rtl"] .hist td{text-align:right;padding:6px 0 6px 10px}
[dir="rtl"] .hint-msg{text-align:left}

/* 非中日韩文字：收窄字距 */
html:not(.cjk) h1,html:not(.cjk) h2,html:not(.cjk) h3{letter-spacing:0}
html:not(.cjk) .btn{letter-spacing:.06em;padding:8px 22px}
html:not(.cjk) .lbl,html:not(.cjk) .sub2,html:not(.cjk) .chiplbl,html:not(.cjk) .chips-intro,html:not(.cjk) .count{letter-spacing:.02em}
html:not(.cjk) .sec h2,html:not(.cjk) .subject,html:not(.cjk) .credits h4,html:not(.cjk) .download h4,html:not(.cjk) .assump summary,html:not(.cjk) .method summary,html:not(.cjk) .fine{letter-spacing:.08em}
html:not(.cjk) .dir .win{letter-spacing:0}
html:not(.cjk) .btn.small{letter-spacing:.04em}
html:not(.cjk) .again button{letter-spacing:.04em}

/* 输入区：未聚焦且为空时显示一个闪烁的假光标，提示这里可以输入 */
.inputwrap{position:relative}
.inputwrap::before{content:"";position:absolute;left:0;top:14px;width:1.5px;height:1.25em;background:var(--ink);opacity:0;pointer-events:none}
.inputwrap.empty:not(.focused)::before{animation:caret 1.1s steps(1) infinite}
@keyframes caret{0%,49%{opacity:.9}50%,100%{opacity:0}}
[dir="rtl"] .inputwrap::before{left:auto;right:0}
textarea{caret-color:var(--ink)}