:root {
  --page-bg: #f5f5ef;
  --surface: #ffffff;
  --surface-soft: #fbfcfa;
  --ink: #17201f;
  --muted: #65716c;
  --line: #d9ded6;
  --accent: #147d70;
  --accent-dark: #0f5f55;
  --warning: #b86f2c;
  --error: #b94235;
  --success-soft: #e8f1ee;
  --warning-soft: #fff7ed;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 12px 30px rgba(23, 32, 31, 0.055);
  --shadow-lift: 0 18px 42px rgba(23, 32, 31, 0.085);
  --font-body: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  --font-data: "Cascadia Mono", "Consolas", monospace;
  --content-width: 1380px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.58;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px max(16px, calc((100vw - var(--content-width)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(245, 245, 239, 0.94);
  backdrop-filter: blur(12px);
}

.app-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.brand-mark {
  position: relative;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(31, 122, 104, 0.75);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 0 13px, rgba(31, 122, 104, 0.12) 13px 14px, transparent 14px 100%),
    linear-gradient(180deg, transparent 0 13px, rgba(31, 122, 104, 0.12) 13px 14px, transparent 14px 100%),
    radial-gradient(circle, rgba(31, 122, 104, 0.07) 0 47%, transparent 48%),
    var(--surface);
  box-shadow: inset 0 0 0 4px rgba(31, 122, 104, 0.07);
  overflow: hidden;
}

.brand-mark::before {
  content: "Pulse";
  position: absolute;
  top: 5px;
  left: 0;
  right: 0;
  color: var(--accent-dark);
  font-family: var(--font-data);
  font-size: 5.5px;
  font-weight: 800;
  line-height: 1;
  text-align: center;
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 5px;
  height: 11px;
  background:
    linear-gradient(var(--accent), var(--accent)) 0 8px / 5px 2px no-repeat,
    linear-gradient(var(--warning), var(--warning)) 5px 2px / 2px 8px no-repeat,
    linear-gradient(var(--warning), var(--warning)) 7px 2px / 6px 2px no-repeat,
    linear-gradient(var(--warning), var(--warning)) 13px 2px / 2px 8px no-repeat,
    linear-gradient(var(--accent-dark), var(--accent-dark)) 15px 8px / 5px 2px no-repeat;
}

.nav-menu summary { display: none; }

.app-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.app-nav a {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.app-nav a:hover,
.app-nav a[aria-current="page"] {
  background: var(--success-soft);
  color: var(--accent-dark);
}

.app-shell {
  width: min(var(--content-width), calc(100% - 28px));
  margin: 0 auto;
  padding: 18px 0 42px;
}

.app-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 14px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--accent);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin-bottom: 6px;
  font-size: clamp(30px, 3.5vw, 48px);
  line-height: 1.12;
}

h2 { margin-bottom: 0; font-size: 21px; line-height: 1.2; }
h3 { margin-bottom: 8px; font-size: 15px; }

.app-title p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-family: var(--font-data);
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 7px;
  max-width: 620px;
}

.status-strip span {
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
}

.status-strip strong { color: var(--ink); font-family: var(--font-data); }
.status-strip .warning-status { border-color: #e4c9a9; background: #fff7ed; }
.status-strip .warning-status strong { color: #8a4e15; }

.platform-grid {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 300px;
  gap: 14px;
  align-items: start;
}

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

.panel-heading, .chart-toolbar {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.control-panel, .chart-panel, .result-panel, .info-panel { padding: 16px; }

.control-note {
  margin: 10px 0 12px;
  padding: 9px 10px;
  border: 1px solid #e4c9a9;
  border-radius: var(--radius-sm);
  background: var(--warning-soft);
  color: #765021;
  font-size: 12px;
}

.param-group {
  margin-top: 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.param-group summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 36px;
  padding: 0 10px;
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
}

.param-group summary span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}

.param-group:not([open]) summary span { font-weight: 700; color: var(--accent-dark); }
.param-group:not([open]) summary span::before { content: "已折叠"; }
.param-group:not([open]) summary span { font-size: 0; }
.param-group:not([open]) summary span::before { font-size: 12px; }
.param-group.is-muted { opacity: 0.72; }

.field {
  display: grid;
  gap: 4px;
  padding: 0 10px 9px;
}

.field span {
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

input, select {
  width: 100%;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0 9px;
  background: #ffffff;
  color: var(--ink);
  outline: none;
}

input:focus, select:focus, button:focus-visible, a:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(31, 122, 104, 0.14);
}

.unit-input {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 58px;
  align-items: center;
  gap: 6px;
}

.unit-input em {
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #edf4f1;
  color: var(--accent-dark);
  font-family: var(--font-data);
  font-size: 12px;
  font-style: normal;
}

.field-note, .field-error {
  min-height: 15px;
  font-size: 12px;
}

.field-note { color: var(--muted); }
.field-error { color: var(--error); }

.button-row {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

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

button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 12px;
  cursor: pointer;
  font-weight: 700;
}

.primary-button { border-color: var(--accent); background: var(--accent); color: #fff; }
.primary-button:hover { background: var(--accent-dark); }
.secondary-button { background: #f8faf8; color: var(--ink); }

.form-message {
  min-height: 20px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.chart-panel { min-width: 0; }
.chart-tabs { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.tab-button { min-height: 32px; background: #f8faf8; color: var(--muted); font-size: 13px; }
.tab-button.is-active { border-color: var(--accent); background: #e8f1ee; color: var(--accent-dark); }

.chart-warning {
  margin: 12px 0;
  padding: 8px 10px;
  border-left: 3px solid var(--warning);
  border-radius: var(--radius-sm);
  background: var(--warning-soft);
  color: #765021;
  font-size: 13px;
}

.canvas-frame {
  position: relative;
  height: 460px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

canvas { display: block; width: 100%; height: 100%; }

.chart-tooltip {
  position: absolute;
  z-index: 5;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.96);
  color: var(--ink);
  font-family: var(--font-data);
  font-size: 12px;
  pointer-events: none;
  box-shadow: 0 8px 18px rgba(32, 37, 34, 0.12);
}

.key-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 9px;
  margin-top: 14px;
}

.key-metrics div, .metric-list div {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}

.key-metrics div { padding: 12px; }
.key-metrics dt, .metric-list dt { color: var(--muted); font-size: 12px; font-weight: 700; }
.key-metrics dd, .metric-list dd { margin: 4px 0 0; color: var(--ink); font-family: var(--font-data); font-weight: 700; }
.key-metrics dd { font-size: 22px; }

.metric-list.compact {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 10px 0 0;
}

.metric-list.compact div { padding: 9px; }
.metric-list.compact div:last-child { grid-column: 1 / -1; }
.metric-list dd { font-size: 14px; }

.mini-section {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.summary-list {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-family: var(--font-data);
  font-size: 12px;
}

.mini-section p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
.info-panel { margin-top: 14px; }

.comparison-grid, .kernel-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.2fr 1.1fr;
  gap: 14px;
  margin-top: 12px;
}

.comparison-grid > div, .kernel-grid > div, .kernel-grid > ul {
  margin: 0;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.formula {
  margin-bottom: 0;
  color: var(--accent-dark);
  font-family: var(--font-data);
  font-size: 15px;
  font-weight: 700;
  overflow-x: auto;
}

.history-list { display: grid; gap: 7px; }
.history-empty { color: var(--muted); font-size: 13px; }

.history-item {
  width: 100%;
  min-height: auto;
  padding: 8px;
  text-align: left;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-weight: 400;
}

.history-item strong {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-data);
  font-size: 12px;
}

.history-item span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.table-wrap { overflow-x: auto; margin-top: 14px; }
table { width: 100%; min-width: 620px; border-collapse: collapse; }
th, td { padding: 11px 13px; border-bottom: 1px solid var(--line); text-align: left; }
th { color: var(--accent-dark); background: #edf4f1; font-family: var(--font-data); font-size: 13px; }
td { color: var(--muted); }
tbody tr:last-child td { border-bottom: 0; }

.usage-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.usage-steps li {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--ink);
  font-weight: 700;
}

.important-note { margin: 14px 0 0; color: var(--muted); }

.workflow-line {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.workflow-line span {
  position: relative;
  padding: 12px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--ink);
  text-align: center;
  font-weight: 700;
}

.workflow-line span:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-dark);
  font-family: var(--font-data);
  font-weight: 700;
}

.capability-grid,
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.capability-grid article,
.roadmap-grid div {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.capability-grid h3 {
  margin-bottom: 6px;
  color: var(--accent-dark);
}

.capability-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.roadmap-grid strong,
.roadmap-grid span {
  display: block;
}

.roadmap-grid strong {
  color: var(--accent-dark);
  font-family: var(--font-data);
  font-size: 16px;
}

.roadmap-grid span {
  margin-top: 4px;
  color: var(--muted);
  font-weight: 700;
}

.project-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.project-navigation h2 {
  margin-bottom: 0;
}

.project-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-nav-links a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--ink);
  font-weight: 700;
}

.project-nav-links a:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px max(16px, calc((100vw - var(--content-width)) / 2));
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-meta,
.footer-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.footer-meta strong {
  color: var(--ink);
}

.footer-links a {
  color: var(--accent-dark);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
}

@media (max-width: 1180px) {
  .platform-grid { grid-template-columns: 300px minmax(0, 1fr); }
  .result-panel { grid-column: 1 / -1; }
  .comparison-grid, .kernel-grid { grid-template-columns: 1fr; }
  .workflow-line { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .workflow-line span:nth-child(3)::after { display: none; }
}

@media (max-width: 860px) {
  .app-header, .app-title { align-items: flex-start; flex-direction: column; }
  .nav-menu { width: 100%; }
  .nav-menu summary {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    padding: 0 10px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--surface);
    color: var(--accent-dark);
    cursor: pointer;
    font-weight: 700;
  }
  .nav-menu:not([open]) .app-nav { display: none; }
  .app-nav, .status-strip { justify-content: flex-start; margin-top: 8px; }
  .app-nav {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  .platform-grid, .usage-steps, .workflow-line, .capability-grid, .roadmap-grid { grid-template-columns: 1fr; }
  .workflow-line span::after { display: none; }
  .result-panel { grid-column: auto; }
  .chart-toolbar { flex-direction: column; }
  .chart-tabs { justify-content: flex-start; }
  .project-navigation, .app-footer { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 520px) {
  .app-shell { width: min(100% - 20px, var(--content-width)); padding-top: 14px; }
  h1 { font-size: 29px; }
  .control-panel, .chart-panel, .result-panel, .info-panel { padding: 14px; }
  .canvas-frame { height: 360px; }
  .metric-list.compact { grid-template-columns: 1fr; }
  .secondary-actions { grid-template-columns: 1fr; }
}