:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #172033;
  --muted: #667085;
  --line: #d7dee9;
  --primary: #1f4e79;
  --primary-dark: #143554;
  --primary-soft: #e7f0f8;
  --success: #12805c;
  --success-soft: #e7f7ef;
  --danger: #c43a31;
  --danger-soft: #fff0ee;
  --warning: #b56b00;
  --warning-soft: #fff5db;
  --note: #fff5f3;
  --note-line: #efaaa1;
  --shadow: 0 14px 36px rgba(20, 53, 84, 0.09);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--text);
}

body {
  margin: 0;
  min-width: 320px;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(16px, 4vw, 48px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  margin-top: 2px;
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.nav-links a,
.back-link {
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--muted);
}

.nav-links a.active,
.nav-links a:hover,
.back-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: #caddeb;
}

.page {
  padding: 28px clamp(16px, 4vw, 48px) 48px;
}

.page-heading {
  max-width: 1120px;
  margin: 0 auto 24px;
}

.page-heading h1 {
  margin: 6px 0 8px;
  font-size: 32px;
  line-height: 1.2;
}

.page-heading p {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
}

.eyebrow,
.section-label {
  margin: 0;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

.home-layout,
.tool-page {
  max-width: 1120px;
  margin: 0 auto;
}

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

.tool-card {
  position: relative;
  display: flex;
  min-height: 190px;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.tool-card:hover {
  border-color: #9eb9d2;
  transform: translateY(-1px);
}

.tool-card h2 {
  margin: 26px 0 8px;
  color: var(--primary-dark);
}

.tool-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.tool-status {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.tool-action {
  margin-top: 18px;
  color: var(--primary);
  font-weight: 700;
}

.roadmap-band {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 20px;
  margin-top: 22px;
  padding: 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.5);
}

.roadmap-band h2 {
  margin: 6px 0 8px;
  font-size: 22px;
}

.roadmap-band p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.tag-list {
  display: flex;
  align-content: flex-start;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list span {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(340px, 1.05fr);
  align-items: start;
  gap: 18px;
}

.input-panel,
.result-panel,
.preview-panel,
.editor-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.input-panel,
.result-panel,
.editor-section {
  padding: 18px;
}

.section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.section-head h2 {
  margin: 4px 0 0;
  font-size: 20px;
}

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

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field span {
  color: #344054;
  font-weight: 700;
}

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

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 42px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 10px 11px;
  background: #fff;
  color: var(--text);
  outline: none;
}

.field textarea {
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(31, 78, 121, 0.13);
}

.span-2 {
  grid-column: 1 / -1;
}

.secondary-button,
.primary-button,
.danger-button,
.plain-button {
  min-height: 40px;
  border-radius: 8px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--primary);
  font-weight: 700;
}

.primary-button {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.danger-button {
  border-color: #efc2bd;
  color: var(--danger);
  background: var(--danger-soft);
}

.plain-button {
  color: var(--muted);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.conclusion-card {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
  padding: 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.conclusion-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.conclusion-card strong {
  font-size: 24px;
  line-height: 1.35;
}

.conclusion-card.profit {
  border-color: #9ed8bf;
  background: var(--success-soft);
  color: var(--success);
}

.conclusion-card.loss {
  border-color: #efb6ad;
  background: var(--danger-soft);
  color: var(--danger);
}

.conclusion-card.even {
  border-color: #edcf91;
  background: var(--warning-soft);
  color: var(--warning);
}

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

.result-item {
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
}

.result-item span,
.result-item strong {
  display: block;
}

.result-item span {
  color: var(--muted);
  font-size: 13px;
}

.result-item strong {
  margin-top: 6px;
  font-size: 20px;
}

.result-item.profit strong {
  color: var(--success);
}

.result-item.loss strong {
  color: var(--danger);
}

.result-item.even strong {
  color: var(--warning);
}

.explanation,
.formula-note,
.error-box {
  margin: 14px 0 0;
  padding: 13px;
  border-radius: 8px;
  line-height: 1.7;
}

.explanation {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.formula-note {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
}

.error-box {
  border: 1px solid #efb6ad;
  background: var(--danger-soft);
  color: var(--danger);
}

.error-box p {
  margin: 0;
}

.confirmation-layout {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(420px, 1.1fr);
  align-items: start;
  gap: 18px;
}

.editor-section {
  display: grid;
  gap: 16px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.editor-block {
  display: grid;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
}

.compact-head h3 {
  margin: 4px 0 0;
  font-size: 18px;
}

.editor-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.editor-summary div {
  padding: 13px;
  border: 1px solid #bed0df;
  border-radius: 8px;
  background: var(--primary-soft);
}

.editor-summary span,
.editor-summary strong {
  display: block;
}

.editor-summary span {
  color: var(--muted);
  font-size: 13px;
}

.editor-summary strong {
  margin-top: 5px;
  color: var(--primary-dark);
  font-size: 18px;
}

.table-scroll,
.preview-table-wrap {
  overflow-x: auto;
}

.size-input-table,
.confirm-table {
  width: 100%;
  border-collapse: collapse;
}

.size-input-table th,
.size-input-table td,
.confirm-table th,
.confirm-table td {
  border: 1px solid #c7d4e2;
  padding: 10px;
  text-align: center;
}

.size-input-table th,
.confirm-table th {
  background: #edf3f8;
  color: var(--primary-dark);
}

.size-input-table td:first-child {
  min-width: 110px;
}

.table-input {
  width: 100%;
  min-height: 38px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 8px;
  text-align: center;
}

.table-remove {
  min-width: 64px;
}

.table-total,
.helper-text,
.empty-state,
.preview-empty {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.table-total strong {
  color: var(--primary);
}

.image-editor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.image-editor-card {
  display: grid;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.image-editor-card img {
  width: 100%;
  height: 160px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.preview-panel {
  position: sticky;
  top: 88px;
  overflow: hidden;
}

.preview-toolbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.preview-toolbar h2 {
  margin: 4px 0 0;
  font-size: 20px;
}

.preview-scroll {
  max-height: calc(100vh - 170px);
  overflow: auto;
  padding: 18px;
  background: #eef2f6;
}

.confirmation-document {
  width: 100%;
  max-width: 794px;
  min-height: 1123px;
  margin: 0 auto;
  padding: 34px;
  background: #fff;
  color: #142033;
  box-shadow: 0 8px 28px rgba(20, 53, 84, 0.16);
}

.document-head {
  text-align: center;
  border-bottom: 2px solid var(--primary);
  padding-bottom: 16px;
}

.document-head h2 {
  margin: 0;
  color: var(--primary-dark);
  font-size: 26px;
  line-height: 1.25;
}

.document-head p {
  margin: 8px 0 0;
  color: var(--muted);
}

.document-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 18px 0;
  padding: 12px;
  border: 1px solid #c7d4e2;
  background: #f8fafc;
}

.document-meta span,
.document-meta strong {
  display: block;
}

.document-meta span {
  color: var(--muted);
  font-size: 13px;
}

.document-meta strong {
  margin-top: 4px;
  color: var(--text);
  font-size: 15px;
}

.summary-strip {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: 10px;
  margin-bottom: 18px;
}

.summary-strip div {
  padding: 12px;
  border: 1px solid #bed0df;
  border-radius: 8px;
  background: var(--primary-soft);
}

.summary-strip span,
.summary-strip strong {
  display: block;
}

.summary-strip span {
  color: var(--muted);
  font-size: 13px;
}

.summary-strip strong {
  margin-top: 4px;
  color: var(--primary-dark);
  font-size: 18px;
}

.preview-section {
  margin-top: 18px;
}

.preview-section h3 {
  margin: 0 0 10px;
  color: var(--primary-dark);
  font-size: 17px;
}

.confirm-table {
  table-layout: fixed;
  font-size: 13px;
}

.confirm-table th,
.confirm-table td {
  min-width: 62px;
}

.remark-box {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--note-line);
  border-radius: 8px;
  background: var(--note);
}

.remark-box strong {
  color: var(--danger);
}

.remark-box p {
  margin: 6px 0 0;
  line-height: 1.7;
}

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

.preview-image-grid figure {
  margin: 0;
  padding: 10px;
  border: 1px solid #c7d4e2;
  border-radius: 8px;
  break-inside: avoid;
}

.preview-image-grid img {
  display: block;
  width: 100%;
  height: 210px;
  object-fit: contain;
  background: #f8fafc;
}

.preview-image-grid figcaption {
  display: grid;
  gap: 4px;
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.6;
}

.preview-image-grid figcaption strong {
  color: var(--primary-dark);
}

.confirm-footer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid #c7d4e2;
  color: var(--primary-dark);
  font-weight: 700;
}

@media (max-width: 860px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
  }

  .tool-grid,
  .roadmap-band,
  .two-column,
  .confirmation-layout,
  .form-grid,
  .editor-summary,
  .document-meta,
  .summary-strip,
  .preview-image-grid,
  .image-editor-grid,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .page-heading h1 {
    font-size: 26px;
  }

  .preview-panel {
    position: static;
  }

  .preview-scroll {
    max-height: none;
    padding: 12px;
  }

  .confirmation-document {
    min-height: auto;
    padding: 22px;
  }

  .preview-toolbar,
  .section-head {
    align-items: stretch;
    flex-direction: column;
  }

  .button-row {
    justify-content: flex-start;
  }
}

@media print {
  body {
    background: #fff;
  }

  .topbar,
  .page-heading,
  .input-panel,
  .editor-section,
  .no-print,
  .form-actions {
    display: none !important;
  }

  .page {
    padding: 0;
  }

  .tool-page,
  .home-layout {
    max-width: none;
  }

  .confirmation-layout {
    display: block;
  }

  .preview-panel {
    position: static;
    border: 0;
    box-shadow: none;
  }

  .preview-scroll {
    max-height: none;
    overflow: visible;
    padding: 0;
    background: #fff;
  }

  .confirmation-document {
    width: 100%;
    max-width: none;
    min-height: auto;
    padding: 10mm;
    box-shadow: none;
  }

  .preview-image-grid figure,
  .preview-section,
  .remark-box {
    break-inside: avoid;
  }
}