:root{font-family:Inter,"Microsoft YaHei",system-ui,sans-serif;color:var(--tool-text);background:var(--tool-canvas);font-synthesis:none;font-size:14px;--line:var(--tool-line);--muted:var(--tool-muted);--cyan:var(--tool-accent)}*{box-sizing:border-box}body{margin:0;background-image:radial-gradient(var(--tool-grid) 1px,transparent 1px);background-size:24px 24px}main{max-width:1280px;margin:auto;padding:32px 24px}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:1px solid var(--line);border-radius:8px;background:var(--tool-panel);color:var(--tool-secondary);padding:10px 14px;min-height:42px;font-weight:600}button:hover{border-color:var(--tool-secondary);background:var(--tool-raised)}button:disabled{opacity:.5;cursor:default}a{color:var(--tool-link);text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,.table-scroll:focus-visible{outline:3px solid var(--tool-focus);outline-offset:3px}[hidden]{display:none!important}.page-header{display:flex;gap:14px;align-items:center;border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:26px}.brand{background:var(--tool-strong);color:var(--tool-on-strong);border-radius:6px;padding:14px 8px;font:bold 12px monospace}.eyebrow{font-size:11px;letter-spacing:1.5px;color:var(--muted);margin:0 0 8px}h1{font-size:26px;margin:0;font-weight:800;letter-spacing:-.8px}h1 span{font:12px "JetBrains Mono",Consolas,monospace;color:var(--tool-placeholder);letter-spacing:1px;margin-left:8px}.sibling{margin-left:auto;font-size:12px}.workspace{display:grid;grid-template-columns:minmax(300px,365px) minmax(0,1fr);gap:24px;align-items:start}.panel{background:var(--tool-panel);border:1px solid var(--line);border-radius:12px;padding:24px;box-shadow:0 2px 8px transparent}h2{font-size:15px;font-weight:750;margin:0 0 20px;display:flex;align-items:center;gap:9px}h2:before{content:"";width:3px;height:14px;background:var(--cyan);border-radius:2px}.inputs h2{margin-bottom:22px}.output-column{display:grid;gap:24px}fieldset{border:0;margin:0;padding:0;min-width:0}.type-switch{display:flex;background:var(--tool-canvas);border-radius:8px;padding:4px;gap:4px;margin-bottom:20px}.type-switch legend{position:absolute;clip:rect(0,0,0,0);width:1px;height:1px;overflow:hidden}.type-switch label{flex:1;cursor:pointer;text-align:center;position:relative}.type-switch input{position:absolute;opacity:0;width:1px;height:1px}.type-switch span{display:block;padding:10px 4px;border-radius:6px;font-size:12px}.type-switch input:checked+span{background:var(--tool-strong);color:var(--tool-on-strong)}.type-switch input:focus-visible+span{outline:3px solid var(--tool-focus)}.field{display:block;font-size:12px;color:var(--tool-secondary);margin:0 0 16px;font-weight:600}.field small{float:right;font-weight:400;color:var(--muted)}input[type=number],select{display:block;width:100%;height:44px;margin-top:8px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--tool-inset);color:var(--tool-text);min-width:0}input[type=number]{font-family:"JetBrains Mono",Consolas,monospace}.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.loan-part{border-top:1px solid var(--tool-line-soft);padding-top:12px;margin-top:18px}.loan-part legend{font-weight:700;font-size:12px;padding-right:8px}.amount-note{background:var(--tool-canvas);border-left:2px solid var(--tool-placeholder);padding:10px 12px;font:12px/1.7 Consolas,monospace;color:var(--tool-secondary)}.form-actions{display:flex;gap:10px;margin-top:22px}.primary{background:var(--tool-strong);color:var(--tool-on-strong);flex:1}.primary:hover{background:var(--tool-strong-hover);color:var(--tool-on-strong)}.primary span{margin-left:10px}.hint,.notes p{font-size:12px;line-height:1.8;color:var(--muted);margin:8px 0 12px}#status,#export-status{font-size:12px;line-height:1.6;min-height:18px;color:var(--tool-muted);margin:10px 0 0}#status.error{color:var(--tool-danger)}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px}.section-heading h2{margin:0}.badge{font:10px Consolas,monospace;background:var(--tool-canvas);padding:5px 8px;border-radius:4px;color:var(--muted)}.method-switch{display:grid;grid-template-columns:1fr 1fr;gap:12px}.method-switch button{text-align:left;padding:14px}.method-switch strong{display:block;font-size:14px}.method-switch small{display:block;font-size:11px;font-weight:400;margin-top:7px;color:var(--muted);line-height:1.5}.method-switch button[aria-pressed=true]{border-color:var(--tool-text);background:var(--tool-canvas);box-shadow:inset 0 -2px var(--cyan)}.payment-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:32px 0 22px}.payment{font-family:"JetBrains Mono",Consolas,monospace;white-space:nowrap}.payment span{font-size:22px;color:var(--tool-muted);margin-right:8px}.payment strong{font-size:clamp(30px,4vw,48px);letter-spacing:-1.5px}.term{border-left:1px solid var(--tool-line-soft);padding-left:22px;text-align:right;flex-shrink:0}.term strong{display:block;font:24px Consolas,monospace}.term span{font-size:11px;color:var(--muted)}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;padding:20px 0;border-top:1px solid var(--tool-line-soft)}.metrics span{display:block;font-size:11px;color:var(--muted);margin-bottom:8px}.metrics strong{font:600 16px Consolas,monospace}.composition{height:7px;border-radius:5px;background:var(--tool-chart-interest);overflow:hidden;margin-top:6px}.composition div{height:100%;background:var(--tool-chart-principal)}.legend{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:10px}.comparison{font-size:12px;line-height:1.8;background:var(--tool-inset);padding:12px;margin:20px 0 0;border:1px solid var(--tool-line-soft);border-radius:8px}.empty{padding:40px 0;color:var(--muted);font-size:13px;line-height:1.8}.table-scroll{overflow:auto;max-height:420px;scrollbar-width:thin}table{border-collapse:collapse;width:100%;font:12px Consolas,monospace;white-space:nowrap}th,td{text-align:right;padding:13px 12px;border-bottom:1px solid var(--tool-line-soft)}th:first-child,td:first-child{text-align:left}th{position:sticky;top:0;background:var(--tool-inset);font-size:11px;color:var(--tool-muted);font-weight:500}tbody tr:hover{background:var(--tool-raised)}.table-footer{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);margin-top:16px}.notes{padding:0 4px}.notes h2{margin-bottom:10px}.notes a{margin-right:16px}footer{font:10px Consolas,monospace;color:var(--tool-placeholder);text-align:center;padding:28px 0 0;letter-spacing:1px}@media(max-width:850px){.workspace{grid-template-columns:1fr}.inputs{max-width:none}}@media(max-width:480px){main{padding:20px 14px}.panel{padding:20px 16px}.page-header{gap:10px;flex-wrap:wrap}h1{font-size:23px}h1 span{display:block;margin:5px 0 0;font-size:10px}.sibling{font-size:11px}.metrics{gap:8px}.metrics strong{font-size:13px}.payment strong{font-size:32px}.term{padding-left:12px}.payment-head{gap:10px}.method-switch{gap:8px}.method-switch button{padding:12px 10px}.section-heading button{font-size:11px}.hint{font-size:11px}}@media(prefers-reduced-motion:no-preference){.panel{animation:appear .25s ease-out}@keyframes appear{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}}

/* 允许明细表在卡片内部滚动，不撑宽手机页面。 */
.output-column,.panel{min-width:0}@media(max-width:850px){.workspace{grid-template-columns:minmax(0,1fr)}}

/* 两列每期条形共用金额尺度；期数共用滚动位置，避免方案错位。 */
.chart-legend{display:flex;gap:20px;font-size:12px;color:var(--muted)}.chart-legend span{display:flex;align-items:center;gap:7px}.chart-legend i{width:10px;height:10px;border-radius:2px}.chart-principal{background:var(--tool-chart-principal)}.chart-interest{background:var(--tool-chart-interest)}.chart-head,.chart-row{display:grid;grid-template-columns:32px minmax(0,1fr) minmax(0,1fr);gap:16px;align-items:center}.chart-head{font-size:12px;padding:12px 10px;background:var(--tool-inset);border-block:1px solid var(--tool-line-soft)}.chart-head span{font-size:10px;color:var(--muted)}#chart-rows{max-height:390px;overflow-y:auto;scrollbar-width:thin;scrollbar-gutter:stable;overscroll-behavior-y:contain;padding:4px 0}.chart-row{width:100%;min-height:24px;height:24px;border:0;border-radius:3px;padding:3px 10px;font-weight:400;text-align:left;background:transparent}.chart-row:hover,.chart-row[aria-pressed=true]{background:var(--tool-raised)}.chart-row:focus-visible{outline:2px solid var(--tool-accent);outline-offset:-2px}.chart-month{font:10px Consolas,monospace;color:var(--muted)}.chart-track{display:flex;width:100%;height:10px;background:var(--tool-canvas);border-radius:2px;overflow:hidden}.chart-track>span{height:100%;flex-shrink:0}#chart-detail{display:grid;gap:7px;border-top:1px solid var(--tool-line-soft);padding-top:14px;margin-top:6px;font:12px/1.7 Consolas,"Microsoft YaHei",monospace;min-height:108px}#chart-detail>span:first-child{font-weight:700;color:var(--tool-text)}.chart-help{margin-bottom:0}@media(max-width:480px){.chart-head,.chart-row{gap:10px;grid-template-columns:26px minmax(0,1fr) minmax(0,1fr);padding-inline:6px}#chart-detail{font-size:11px}.chart-head{font-size:11px}}@media(pointer:coarse){.chart-row{height:30px;min-height:30px}}
.chart-subtitle{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 10px;font-size:12px;font-weight:700}.chart-subtitle span{font-weight:400;color:var(--muted);font-size:11px}.chart-overview{display:grid;grid-template-columns:32px minmax(0,1fr) minmax(0,1fr);gap:16px;padding:10px;height:300px}.chart-overview svg{display:block;width:100%;height:280px;background:var(--tool-canvas);border-radius:2px;overflow:hidden}.chart-overview .chart-principal{fill:var(--tool-chart-principal)}.chart-overview .chart-interest{fill:var(--tool-chart-interest)}.chart-overview-ticks{display:flex;flex-direction:column;justify-content:space-between;font:10px Consolas,monospace;color:var(--muted)}@media(max-width:480px){.chart-overview{grid-template-columns:26px minmax(0,1fr) minmax(0,1fr);gap:10px;padding-inline:6px}}

.page-header{flex-wrap:wrap}.legend span:before{content:"";display:inline-block;width:8px;height:8px;border-radius:2px;margin-right:6px;background:var(--tool-chart-principal)}.legend span:last-child:before{background:var(--tool-chart-interest)}
@media print{body{background:white}.page-header .sibling,.form-actions,#export,#show-all{display:none}.panel{box-shadow:none;break-inside:avoid}.table-scroll,#chart-rows{max-height:none;overflow:visible}}