:root {
  --bg: #f4f1ea;
  --panel: #fffdf8;
  --panel-soft: #f8f5ed;
  --ink: #1e201c;
  --ink-soft: #4e5148;
  --muted: #747166;
  --faint: #8b8678;
  --line: #e5dfd2;
  --line-strong: #d6cebd;
  --green: #176b5b;
  --green-deep: #0e4b40;
  --green-soft: #e6f1ec;
  --green-bright: #9ed8c6;
  --orange: #c4662f;
  --orange-soft: #f8e9dc;
  --orange-bright: #f0b58a;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(42, 37, 25, 0.03), 0 20px 50px -28px rgba(42, 37, 25, 0.22);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei",
    system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Songti SC", "STSong", "Noto Serif SC", Georgia, "Times New Roman",
    serif;
  --font-num: "SF Pro Display", "Helvetica Neue", "PingFang SC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: var(--font-sans);
  background:
    radial-gradient(900px 520px at 88% -8%, rgba(23, 107, 91, 0.09), transparent 70%),
    radial-gradient(760px 480px at -8% 26%, rgba(196, 102, 47, 0.07), transparent 72%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

[hidden] {
  display: none !important;
}

button,
input,
summary {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

.page {
  width: min(1220px, 100%);
  margin: 0 auto;
  padding: 28px 32px 48px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #f4efe3;
  background: var(--green-deep);
  border-radius: 11px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.brand-mark svg {
  width: 19px;
  height: 19px;
}

.brand-name {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.header-note {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.hero {
  max-width: 780px;
  padding: 68px 0 44px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--green);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.7rem, 5.6vw, 4.6rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.06;
}

.lede {
  max-width: 610px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.layout {
  display: grid;
  grid-template-columns: 350px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.form-panel {
  position: sticky;
  top: 24px;
  padding: 24px;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.panel-heading h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.form-heading {
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--green);
  font-size: 11px;
  font-weight: 600;
}

.live-indicator i {
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(23, 107, 91, 0.12);
}

.field {
  margin-top: 22px;
  padding: 0;
  border: 0;
}

.field-tight {
  margin-top: 20px;
}

.field > label,
.field legend,
.label-row label,
.rate-field label {
  display: block;
  margin: 0;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.field legend {
  padding: 0;
}

.label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.field > label {
  margin-bottom: 8px;
}

.field-hint {
  margin: 0;
  color: var(--faint);
  font-size: 11px;
  font-weight: 400;
  line-height: 1.5;
}

.field > .field-hint {
  margin-top: 8px;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin-top: 8px;
  padding: 4px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 13px;
}

.segmented button {
  padding: 9px 6px;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-radius: 9px;
  font-size: 12px;
  font-weight: 600;
  transition: background 150ms ease, color 150ms ease, box-shadow 150ms ease;
}

.segmented button:hover {
  color: var(--ink);
}

.segmented button.active {
  color: var(--green-deep);
  background: #fff;
  box-shadow: 0 1px 2px rgba(30, 32, 28, 0.06), 0 3px 10px -4px rgba(30, 32, 28, 0.16);
}

.segmented.two {
  grid-template-columns: repeat(2, 1fr);
}

.input-shell {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 50px;
  padding: 0 14px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.input-shell:focus-within {
  background: #fff;
  border-color: rgba(23, 107, 91, 0.55);
  box-shadow: 0 0 0 3px rgba(23, 107, 91, 0.09);
}

.input-shell.invalid {
  border-color: rgba(181, 74, 49, 0.55);
  box-shadow: 0 0 0 3px rgba(181, 74, 49, 0.08);
}

.input-shell input {
  width: 100%;
  min-width: 0;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: 0;
  font-family: var(--font-num);
  font-size: 21px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  appearance: textfield;
}

.input-shell input::-webkit-outer-spin-button,
.input-shell input::-webkit-inner-spin-button {
  margin: 0;
  appearance: none;
}

.input-shell .unit {
  flex: none;
  color: var(--faint);
  font-size: 12px;
  font-weight: 500;
}

.input-shell.compact {
  height: 44px;
  padding: 0 12px;
}

.input-shell.compact input {
  font-size: 17px;
}

.chips {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.chips button {
  padding: 7px 12px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  transition: all 150ms ease;
}

.chips button:hover {
  color: var(--green-deep);
  border-color: rgba(23, 107, 91, 0.35);
}

.chips button.active {
  color: var(--green-deep);
  background: var(--green-soft);
  border-color: rgba(23, 107, 91, 0.32);
}

.range {
  width: 100%;
  height: 6px;
  margin: 18px 0 4px;
  background: linear-gradient(
    to right,
    var(--green) 0%,
    var(--green) var(--fill, 50%),
    #e7e1d4 var(--fill, 50%),
    #e7e1d4 100%
  );
  border-radius: 999px;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.range::-webkit-slider-thumb {
  width: 19px;
  height: 19px;
  background: #fff;
  border: 5px solid var(--green);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(30, 32, 28, 0.2);
  cursor: grab;
  appearance: none;
  -webkit-appearance: none;
}

.range::-moz-range-thumb {
  width: 10px;
  height: 10px;
  background: #fff;
  border: 5px solid var(--green);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(30, 32, 28, 0.2);
  cursor: grab;
}

.range:active::-webkit-slider-thumb {
  cursor: grabbing;
}

.split-legend {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 7px;
  color: var(--faint);
  font-size: 10px;
}

.split-summary {
  color: var(--ink-soft);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.advanced {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.advanced summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  list-style: none;
  cursor: pointer;
}

.advanced summary::-webkit-details-marker,
.method summary::-webkit-details-marker {
  display: none;
}

.advanced summary::after {
  width: 7px;
  height: 7px;
  margin-left: 4px;
  border-right: 1.5px solid var(--faint);
  border-bottom: 1.5px solid var(--faint);
  transform: rotate(45deg);
  transition: transform 160ms ease;
  content: "";
}

.advanced[open] summary::after {
  transform: rotate(225deg);
}

.summary-meta {
  margin-left: auto;
  color: var(--faint);
  font-size: 11px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.rate-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.rate-grid.single {
  grid-template-columns: minmax(0, 1fr);
}

.rate-field label {
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
}

.rate-actions {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}

.link-button {
  flex: none;
  padding: 0;
  color: var(--green);
  background: transparent;
  border: 0;
  font-size: 11px;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.rate-note {
  color: var(--faint);
  font-size: 10px;
  line-height: 1.5;
  text-align: right;
}

.results {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  min-width: 0;
}

.summary-panel {
  position: relative;
  overflow: hidden;
  padding: 28px 30px 24px;
  color: #f5f1e6;
  background:
    radial-gradient(560px 280px at 100% 0%, rgba(158, 216, 198, 0.16), transparent 70%),
    linear-gradient(145deg, #15463c 0%, #0e332c 62%, #0c2c26 100%);
  border: 0;
  box-shadow: 0 24px 55px -30px rgba(9, 48, 40, 0.75);
}

.summary-panel::after {
  position: absolute;
  top: -70px;
  right: -50px;
  width: 210px;
  height: 210px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.summary-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.summary-kicker {
  margin: 0 0 8px;
  color: rgba(245, 241, 230, 0.6);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.big-number {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(2.45rem, 4.6vw, 3.6rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.045em;
  line-height: 1;
}

.payment-note {
  margin: 10px 0 0;
  color: rgba(245, 241, 230, 0.6);
  font-size: 11px;
  line-height: 1.5;
}

.payment-note:empty {
  display: none;
}

.term-badge {
  flex: none;
  padding: 7px 11px;
  color: rgba(245, 241, 230, 0.78);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.part-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.part-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 10px;
  color: rgba(245, 241, 230, 0.86);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.part-chip i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
}

.part-chip.provident i {
  background: var(--green-bright);
}

.part-chip.commercial i {
  background: var(--orange-bright);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.stat {
  min-width: 0;
  padding-right: 14px;
}

.stat + .stat {
  padding-left: 16px;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.stat span {
  display: block;
  margin-bottom: 6px;
  color: rgba(245, 241, 230, 0.52);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.stat strong {
  display: block;
  overflow: hidden;
  color: #f5f1e6;
  font-family: var(--font-num);
  font-size: 16px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stat .accent-interest {
  color: #f0b98f;
}

.chart-panel,
.table-panel {
  padding: 24px 26px 20px;
}

.chart-heading {
  margin-bottom: 12px;
}

.panel-sub {
  margin: 5px 0 0;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.5;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 2px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 500;
  white-space: nowrap;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 16px;
  height: 2px;
  border-radius: 2px;
}

.swatch.principal {
  background: var(--green);
}

.swatch.interest {
  background: var(--orange);
}

.chart-figure {
  margin: 0;
}

.chart-wrap {
  position: relative;
  width: 100%;
  min-height: 320px;
}

#chart {
  display: block;
  width: 100%;
  height: auto;
  touch-action: pan-y;
}

.chart-tooltip {
  position: absolute;
  z-index: 5;
  width: 208px;
  padding: 12px 13px;
  color: var(--ink);
  background: rgba(255, 253, 248, 0.97);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 16px 40px -18px rgba(30, 32, 28, 0.35);
  backdrop-filter: blur(8px);
  pointer-events: none;
}

.tooltip-title {
  margin: 0 0 9px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  font-weight: 650;
}

.tooltip-title span {
  color: var(--faint);
  font-weight: 400;
}

.tooltip-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
}

.tooltip-row strong {
  color: var(--ink);
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.tooltip-row.principal strong {
  color: var(--green);
}

.tooltip-row.interest strong {
  color: var(--orange);
}

.chart-caption {
  margin-top: 8px;
  color: var(--faint);
  font-size: 10px;
}

.table-panel {
  padding-bottom: 0;
}

.table-count {
  flex: none;
  padding: 5px 9px;
  color: var(--muted);
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 10px;
  font-weight: 600;
  white-space: nowrap;
}

.table-scroll {
  max-height: 430px;
  margin: 16px -26px 0;
  padding: 0 26px;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.table-scroll::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.table-scroll::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border: 2px solid var(--panel);
  border-radius: 999px;
}

table {
  width: 100%;
  min-width: 480px;
  border-collapse: separate;
  border-spacing: 0;
  font-family: var(--font-num);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 10px 12px;
  text-align: left;
  white-space: nowrap;
}

thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  color: var(--faint);
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

th.num,
td.num {
  text-align: right;
}

tbody td {
  color: var(--ink-soft);
  border-bottom: 1px solid rgba(229, 223, 210, 0.55);
}

tbody tr:hover td {
  background: rgba(230, 241, 236, 0.5);
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr.last-row td {
  color: var(--green-deep);
  background: var(--green-soft);
  font-weight: 600;
}

tbody td:first-child {
  color: var(--faint);
  font-family: var(--font-sans);
  font-size: 11px;
}

tbody tr.last-row td:first-child {
  color: var(--green-deep);
}

.table-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0 -26px;
  padding: 13px 26px;
  color: var(--faint);
  background: var(--panel-soft);
  border-top: 1px solid var(--line);
  font-size: 10px;
  font-variant-numeric: tabular-nums;
}

.table-foot span:last-child {
  color: var(--ink-soft);
}

.method {
  padding: 0 4px;
}

.method details {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.method summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  list-style: none;
  cursor: pointer;
}

.method summary::after {
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--faint);
  border-bottom: 1.5px solid var(--faint);
  transform: rotate(45deg);
  transition: transform 160ms ease;
  content: "";
}

.method details[open] summary::after {
  transform: rotate(225deg);
}

.method-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  padding: 18px 0 4px;
}

.method-body h3 {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 650;
}

.method-body h3:not(:first-child) {
  margin-top: 16px;
}

.method-body p {
  margin: 0 0 9px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.75;
}

.method-body code {
  display: block;
  margin: 10px 0;
  padding: 10px 12px;
  color: var(--green-deep);
  background: var(--green-soft);
  border-radius: 9px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 38px;
  padding-top: 20px;
  color: var(--faint);
  border-top: 1px solid var(--line);
  font-size: 10px;
}

@media (max-width: 1040px) {
  .layout {
    grid-template-columns: 320px minmax(0, 1fr);
  }

  .summary-panel {
    padding: 24px 24px 20px;
  }

  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 0;
  }

  .stat:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .method-body {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

@media (max-height: 780px) and (min-width: 861px) {
  .form-panel {
    position: static;
  }
}

@media (max-width: 860px) {
  .page {
    padding: 22px 22px 40px;
  }

  .hero {
    padding: 48px 0 32px;
  }

  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .form-panel {
    position: static;
  }
}

@media (max-width: 620px) {
  .page {
    padding: 18px 16px 32px;
  }

  .header-note {
    display: none;
  }

  .hero {
    padding: 42px 0 28px;
  }

  .hero h1 {
    font-size: 2.45rem;
  }

  .lede {
    margin-top: 16px;
    font-size: 13px;
    line-height: 1.75;
  }

  .hero-break {
    display: none;
  }

  .layout {
    gap: 16px;
  }

  .form-panel,
  .chart-panel,
  .table-panel {
    border-radius: 18px;
  }

  .form-panel {
    padding: 20px;
  }

  .summary-panel {
    padding: 22px 20px 18px;
    border-radius: 18px;
  }

  .big-number {
    font-size: 2.55rem;
  }

  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 0;
    margin-top: 22px;
    padding-top: 17px;
  }

  .stat {
    padding-right: 10px;
  }

  .stat + .stat {
    padding-left: 12px;
  }

  .stat:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .stat strong {
    font-size: 14px;
  }

  .chart-panel {
    padding: 20px 18px 16px;
  }

  .chart-wrap {
    min-height: 260px;
  }

  .chart-heading {
    flex-direction: column;
    gap: 10px;
  }

  .table-panel {
    padding: 20px 18px 0;
  }

  .table-scroll {
    margin-right: -18px;
    margin-left: -18px;
    padding-right: 18px;
    padding-left: 18px;
    -webkit-overflow-scrolling: touch;
  }

  table {
    min-width: 0;
    font-size: 10px;
  }

  th,
  td {
    padding: 8px 4px;
  }

  thead th {
    font-size: 9px;
  }

  .table-foot {
    margin-right: -18px;
    margin-left: -18px;
    padding-right: 18px;
    padding-left: 18px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}