:root {
  --bg: #f5f7fa;
  --card: rgba(255, 255, 255, 0.96);
  --line: rgba(15, 23, 42, 0.08);
  --text: #162033;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --danger: #dc2626;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  --radius-lg: 18px;
  --radius-sm: 10px;
  --control-height: 54px;
  --control-font-size: 15px;
  --font: "Noto Sans SC", "Microsoft YaHei UI", "PingFang SC", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

.page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 20px 40px;
}

.hero {
  margin-bottom: 18px;
  padding: 4px 2px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  max-width: 720px;
}

.tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 5px;
  border-radius: 999px;
  margin: 8px 0 18px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
}

.tab-button {
  border: 0;
  border-radius: 999px;
  padding: 10px 16px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  transform: none;
  box-shadow: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.tab-button.is-active {
  color: #fff;
  background: var(--accent);
  box-shadow: none;
}

.tab-button:hover:not(:disabled),
.tab-button:active:not(:disabled),
.tab-button.is-pressed:not(:disabled) {
  transform: none;
  box-shadow: none;
}

.tab-button:not(.is-active):hover:not(:disabled),
.tab-button:not(.is-active):active:not(:disabled),
.tab-button:not(.is-active).is-pressed:not(:disabled) {
  background: transparent;
  color: var(--muted);
}

.tab-button.is-active:hover:not(:disabled),
.tab-button.is-active:active:not(:disabled),
.tab-button.is-active.is-pressed:not(:disabled) {
  background: var(--accent);
  color: #fff;
}

.panel {
  display: none;
  gap: 18px;
}

.panel.is-active {
  display: grid;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.monthly-sections {
  display: contents;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 18px;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 17px;
}

.card .subtle {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.field-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field-grid.columns-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  font-size: 13px;
  color: var(--muted);
}

.field input,
.field select {
  width: 100%;
  height: var(--control-height);
  border: 1px solid rgba(64, 83, 74, 0.16);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  font: inherit;
  font-size: var(--control-font-size);
  line-height: 1.2;
  background: rgba(255, 255, 255, 0.76);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input:focus,
.field select:focus {
  border-color: rgba(31, 111, 90, 0.45);
  box-shadow: 0 0 0 4px rgba(31, 111, 90, 0.08);
}

.field small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

button {
  position: relative;
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font: inherit;
  cursor: pointer;
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: transform 0.14s ease, box-shadow 0.18s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease;
}

button:hover:not(:disabled) {
  transform: translateY(-0.5px);
  box-shadow: 0 6px 12px rgba(15, 23, 42, 0.06);
}

button:active:not(:disabled),
button.is-pressed:not(:disabled) {
  transform: translateY(0.5px) scale(0.9925);
  box-shadow: inset 0 1px 4px rgba(15, 23, 42, 0.1), 0 0 0 3px rgba(37, 99, 235, 0.1);
}

button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14), 0 8px 20px rgba(15, 23, 42, 0.08);
}

button.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: none;
}

button.primary:hover:not(:disabled) {
  background: #1d4ed8;
}

button.primary:active:not(:disabled),
button.primary.is-pressed:not(:disabled) {
  background: #1d4ed8;
}

button.secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line);
}

button.secondary:hover:not(:disabled) {
  background: #f8fbff;
  color: #1d4ed8;
  border-color: rgba(37, 99, 235, 0.18);
}

button.secondary:active:not(:disabled),
button.secondary.is-pressed:not(:disabled) {
  background: #f8fbff;
  color: #1d4ed8;
  border-color: rgba(37, 99, 235, 0.18);
}

button.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

button.ghost:hover:not(:disabled) {
  background: rgba(37, 99, 235, 0.06);
  color: var(--text);
  border-color: rgba(37, 99, 235, 0.16);
}

button.ghost:active:not(:disabled),
button.ghost.is-pressed:not(:disabled) {
  background: rgba(37, 99, 235, 0.06);
  color: var(--text);
  border-color: rgba(37, 99, 235, 0.16);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
  box-shadow: none;
}

.results {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.stat {
  border-radius: 14px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 8px;
}

.stat strong {
  display: block;
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hint {
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.8;
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.08);
  color: #1e3a8a;
}

.error {
  color: var(--danger);
  font-size: 13px;
  line-height: 1.8;
  margin-top: 10px;
  min-height: 24px;
}

.summary-box {
  border-radius: 14px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  line-height: 1.8;
  font-size: 13px;
  color: var(--muted);
}

.summary-box strong {
  color: var(--text);
}

.social-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.social-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 10px;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.social-label {
  grid-column: 1 / -1;
  display: grid;
  gap: 2px;
  font-weight: 700;
  font-size: 13px;
}

.social-label small {
  display: block;
  margin-top: 0;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.5;
  font-size: 11px;
}

.field-inline {
  display: grid;
  gap: 4px;
}

.field-inline label {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.35;
}

.field-inline input {
  width: 100%;
  height: 44px;
  border: 1px solid rgba(64, 83, 74, 0.16);
  border-radius: var(--radius-sm);
  padding: 0 12px;
  font: inherit;
  font-size: 14px;
  line-height: 1.2;
  background: rgba(255, 255, 255, 0.76);
  color: var(--text);
  outline: none;
}

.field-inline input:focus {
  border-color: rgba(31, 111, 90, 0.45);
  box-shadow: 0 0 0 4px rgba(31, 111, 90, 0.08);
}

.tiny {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.import-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.04);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.compact-details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow);
  padding: 0;
}

.compact-details summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text);
  transform: none;
  box-shadow: none;
  transition: color 0.18s ease;
}

.compact-details summary::-webkit-details-marker {
  display: none;
}

.compact-details summary:hover {
  background: transparent;
}

.compact-details summary:active,
.compact-details summary.is-pressed {
  transform: none;
  background: transparent;
  box-shadow: none;
}

.compact-details summary:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px rgba(37, 99, 235, 0.18);
}

.compact-details[open] summary {
  border-bottom: 1px solid var(--line);
}

.compact-details-body {
  padding: 16px 18px 18px;
}

.mode-switch {
  display: flex;
  align-items: stretch;
  padding: 4px;
  gap: 4px;
  border-radius: 12px;
  background: #f8fafc;
  border: 1px solid var(--line);
  margin: 0;
  width: 100%;
  min-height: var(--control-height);
}

.mode-button {
  min-width: 0;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--muted);
  border: 0;
  padding: 0 8px;
  font-size: 14px;
  line-height: 1;
  white-space: nowrap;
  word-break: keep-all;
  transform: none;
  box-shadow: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.mode-button.is-active {
  background: #fff;
  color: var(--accent);
  border: 1px solid rgba(37, 99, 235, 0.14);
}

.mode-button:hover:not(:disabled),
.mode-button:active:not(:disabled),
.mode-button.is-pressed:not(:disabled) {
  transform: none;
  box-shadow: none;
}

.mode-button:not(.is-active):hover:not(:disabled),
.mode-button:not(.is-active):active:not(:disabled),
.mode-button:not(.is-active).is-pressed:not(:disabled) {
  background: transparent;
  color: var(--muted);
}

.mode-button.is-active:hover:not(:disabled),
.mode-button.is-active:active:not(:disabled),
.mode-button.is-active.is-pressed:not(:disabled) {
  background: #fff;
  color: var(--accent);
  border: 1px solid rgba(37, 99, 235, 0.14);
}

.stack {
  display: grid;
  gap: 12px;
}

.table-wrap {
  overflow: auto;
  border-radius: 18px;
  border: 1px solid rgba(64, 83, 74, 0.1);
  background: rgba(255, 255, 255, 0.74);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 1220px;
}

th,
td {
  padding: 11px 10px;
  border-bottom: 1px solid rgba(64, 83, 74, 0.08);
  text-align: left;
  vertical-align: middle;
  font-size: 13px;
}

thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: rgba(243, 237, 226, 0.96);
  color: var(--muted);
}

tbody tr:nth-child(odd) {
  background: rgba(255, 255, 255, 0.5);
}

tbody td input {
  width: 100%;
  min-width: 90px;
  border: 1px solid rgba(64, 83, 74, 0.14);
  border-radius: 10px;
  padding: 9px 10px;
  font: inherit;
  background: rgba(255, 255, 255, 0.84);
}

.calc-cell {
  color: var(--text);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.calc-cell small {
  display: block;
  color: var(--muted);
  margin-top: 4px;
}

.year-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.calc-bar {
  display: grid;
  grid-template-columns: 124px 196px minmax(280px, 1fr) auto;
  gap: 10px;
  align-items: start;
}

.calc-bar .field {
  min-width: 0;
  gap: 6px;
  grid-template-rows: 18px var(--control-height) auto;
  align-content: start;
}

.calc-bar .field label {
  display: flex;
  align-items: flex-end;
  line-height: 1.3;
}

.calc-bar .field input,
.calc-bar .mode-switch {
  min-height: var(--control-height);
}

.calc-bar .field small {
  min-height: 18px;
  margin: 0;
}

.calc-bar .mode-button {
  min-height: calc(var(--control-height) - 10px);
}

.calc-bar .calc-action {
  min-width: 232px;
}

.calc-bar .button-row {
  margin-top: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 8px;
  align-items: stretch;
}

.calc-bar .button-row button {
  height: var(--control-height);
  white-space: nowrap;
  font-size: var(--control-font-size);
  line-height: 1;
}

.field input[type="file"] {
  padding: 8px 10px;
  border-style: dashed;
  background: #fff;
  transform: none;
  box-shadow: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.field input[type="file"]:hover {
  border-color: rgba(64, 83, 74, 0.16);
  background: #fff;
}

.field input[type="file"]:active,
.field input[type="file"].is-pressed {
  transform: none;
  border-color: rgba(64, 83, 74, 0.16);
  background: #fff;
  box-shadow: none;
}

.field input[type="file"]:focus-visible {
  border-color: rgba(37, 99, 235, 0.34);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.field input[type="file"]::file-selector-button,
.field input[type="file"]::-webkit-file-upload-button {
  margin-right: 12px;
  border: 1px solid rgba(37, 99, 235, 0.18);
  border-radius: 8px;
  padding: 8px 12px;
  background: #eff6ff;
  color: #1d4ed8;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transform: none;
  box-shadow: none;
  transition: none;
}

.field input[type="file"]:hover::file-selector-button,
.field input[type="file"]:hover::-webkit-file-upload-button {
  background: #eff6ff;
  border-color: rgba(37, 99, 235, 0.18);
}

.field input[type="file"]:active::file-selector-button,
.field input[type="file"]:active::-webkit-file-upload-button,
.field input[type="file"].is-pressed::file-selector-button,
.field input[type="file"].is-pressed::-webkit-file-upload-button {
  transform: none;
  background: #eff6ff;
  border-color: rgba(37, 99, 235, 0.18);
  box-shadow: none;
}

.calc-action label {
  visibility: hidden;
}

.compact-params {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.compact-cumulative {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.compact-params .field,
.compact-cumulative .field {
  gap: 4px;
  align-content: start;
  grid-template-rows: minmax(18px, auto) var(--control-height) auto;
}

.compact-params .field label,
.compact-cumulative .field label {
  line-height: 1.35;
}

.compact-params .field input,
.compact-cumulative .field input {
  padding: 0 14px;
}

.monthly-params-card,
.monthly-cumulative-card,
.monthly-result-card {
  display: grid;
  gap: 12px;
  align-items: start;
}

.monthly-params-card {
  order: 1;
}

.monthly-result-card {
  order: 2;
}

.monthly-cumulative-card {
  order: 3;
}

.monthly-params-card {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.monthly-params-card h2,
.monthly-params-card > .subtle,
.monthly-params-card > .field-grid.compact-params,
.monthly-params-card > .social-grid {
  grid-column: 1 / -1;
}

.monthly-params-card > .summary-box {
  grid-column: 1 / -1;
  margin-top: 0 !important;
}

.monthly-params-card > .summary-box + .field-grid {
  grid-column: 1 / -1;
  margin-top: 0 !important;
  gap: 10px;
}

.monthly-cumulative-card > .field-grid.compact-cumulative .field:has(#m-year-tax-burden) {
  grid-column: span 2;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8fafc;
  padding: 10px;
}

.monthly-cumulative-card > .field-grid.compact-cumulative .field:has(#m-year-tax-burden) input {
  background: #fff;
}

.annual-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

#annual-panel[data-annual-detail-mode="simple"] [data-annual-section="detail-special"] {
  display: none;
}

#annual-panel[data-annual-detail-mode="detail"] [data-annual-section="simple-special"] {
  display: none;
}

.annual-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 14px;
  display: grid;
  gap: 12px;
}

.annual-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.annual-item-head strong {
  font-size: 16px;
}

.annual-item-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.annual-item .field-inline label {
  font-size: 11px;
}

.annual-result-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.annual-result {
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #f8fafc;
  padding: 10px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

.annual-result strong {
  display: block;
  color: var(--text);
  font-size: 15px;
  margin-top: 4px;
}

details {
  border-radius: 18px;
  border: 1px solid rgba(64, 83, 74, 0.1);
  background: rgba(255, 255, 255, 0.65);
  padding: 14px 16px;
}

details summary {
  cursor: pointer;
  font-weight: 700;
}

details p,
details ul {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

details ul {
  padding-left: 18px;
  margin-bottom: 0;
}

.footer {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.footer a {
  color: var(--accent);
}

@media (max-width: 1320px) {
  .compact-params {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .compact-cumulative {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .social-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .calc-bar {
    grid-template-columns: 118px 188px minmax(240px, 1fr) auto;
  }

  .monthly-params-card {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .monthly-params-card > .summary-box,
  .monthly-params-card > .summary-box + .field-grid {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1120px) {
  .grid-2,
  .calc-bar,
  .annual-grid {
    grid-template-columns: 1fr;
  }

  .field-grid,
  .field-grid.columns-3,
  .annual-item-grid,
  .annual-result-strip {
    grid-template-columns: 1fr;
  }

  .results,
  .year-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .calc-bar .calc-action {
    min-width: 0;
  }

  .calc-bar .button-row {
    grid-auto-flow: row;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-columns: auto;
  }

  .calc-bar .button-row button {
    width: 100%;
  }
}

@media (max-width: 900px) {
  .page {
    padding: 18px 14px 28px;
  }

  .hero {
    margin-bottom: 12px;
    padding: 0;
  }

  .hero h1 {
    font-size: clamp(24px, 7vw, 30px);
  }

  .hero p {
    font-size: 13px;
    line-height: 1.65;
  }

  .tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .tab-button {
    width: 100%;
    text-align: center;
  }

  .card,
  details:not(.compact-details) {
    padding: 14px;
  }

  .compact-details summary {
    padding: 14px;
    gap: 8px;
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .compact-details-body {
    padding: 14px;
  }

  .button-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button-row button {
    width: 100%;
  }

  .results,
  .year-summary,
  .social-grid,
  .social-row,
  .monthly-params-card,
  .annual-grid,
  .annual-item-grid,
  .annual-result-strip,
  .field-grid,
  .field-grid.columns-3,
  .compact-params,
  .compact-cumulative {
    grid-template-columns: 1fr;
  }

  .monthly-cumulative-card > .field-grid.compact-cumulative .field:has(#m-year-tax-burden) {
    grid-column: auto;
  }

  .calc-bar {
    gap: 12px;
  }

  .calc-bar .field {
    grid-template-rows: auto var(--control-height) auto;
  }

  .calc-bar .field small {
    min-height: 0;
  }

  .calc-bar .button-row {
    grid-template-columns: 1fr;
  }

  .annual-item-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .annual-item-head strong {
    font-size: 15px;
  }

  .import-badge {
    max-width: 100%;
  }

  .mode-switch {
    min-height: auto;
  }

  .mode-button {
    white-space: normal;
    line-height: 1.25;
    padding: 8px 10px;
    min-height: 44px;
  }

  .social-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  :root {
    --control-height: 50px;
    --control-font-size: 14px;
  }

  .page {
    padding: 12px 10px 24px;
  }

  .tabs {
    gap: 4px;
    padding: 4px;
  }

  .tab-button {
    padding: 10px 12px;
    font-size: 14px;
  }

  .card,
  details,
  .compact-details {
    border-radius: 14px;
  }

  .card {
    padding: 12px;
  }

  .compact-details summary,
  .compact-details-body {
    padding: 12px;
  }

  .field input,
  .field select,
  .field-inline input {
    padding: 0 12px;
  }

  .field label {
    font-size: 12px;
  }

  .field-inline label,
  .annual-item .field-inline label {
    font-size: 12px;
  }

  .social-row,
  .annual-item,
  .summary-box,
  .hint,
  .annual-result {
    padding: 12px;
  }

  .footer {
    font-size: 12px;
    line-height: 1.7;
  }
}