:root {
  --bg: #f6f8f7;
  --surface: #ffffff;
  --surface-2: #eef4f2;
  --text: #17211d;
  --muted: #65736d;
  --line: #d9e2de;
  --brand: #12685a;
  --brand-2: #0b4f78;
  --accent: #b36b18;
  --gain: #c23b30;
  --loss: #16805d;
  --shadow: 0 16px 40px rgba(24, 38, 33, 0.08);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.55;
}

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

button,
input,
select {
  font: inherit;
}

.shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(217, 226, 222, 0.86);
  background: rgba(246, 248, 247, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 150px;
}

.mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  font-weight: 800;
}

.brand strong {
  display: block;
  font-size: 17px;
  letter-spacing: 0;
}

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

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.nav a {
  min-height: 36px;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
}

.nav a:hover,
.nav a.active {
  color: var(--brand);
  background: var(--surface-2);
}

.main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 30px 0 42px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 28px;
  align-items: stretch;
  padding: 20px 0 26px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 330px;
}

.kicker {
  margin: 0 0 12px;
  color: var(--brand);
  font-weight: 700;
  font-size: 14px;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 16px;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.04;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
}

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

.btn.ghost {
  background: transparent;
}

.btn:hover {
  transform: translateY(-1px);
}

.market-board {
  display: grid;
  gap: 12px;
  align-content: center;
  min-height: 330px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

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

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

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

.ticker strong {
  display: block;
  margin: 6px 0;
  font-size: 24px;
}

.up {
  color: var(--gain);
}

.down {
  color: var(--loss);
}

.section {
  padding: 28px 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
}

.section-head h2 {
  margin-bottom: 4px;
  font-size: 26px;
}

.section-head p {
  margin-bottom: 0;
  color: var(--muted);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.tool-card,
.panel,
.metric,
.table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.tool-card {
  min-height: 190px;
  padding: 18px;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.tool-card .icon {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--brand);
}

.tool-card h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.tool-card p {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 14px;
}

.tool-card span:last-child {
  color: var(--brand);
  font-weight: 700;
}

.dashboard {
  display: grid;
  grid-template-columns: 390px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.panel {
  padding: 18px;
}

.panel h2 {
  margin-bottom: 14px;
  font-size: 21px;
}

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

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

.field.full {
  grid-column: 1 / -1;
}

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

input,
select {
  width: 100%;
  min-height: 42px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: #fff;
}

input:focus,
select:focus {
  outline: 2px solid rgba(18, 104, 90, 0.2);
  border-color: var(--brand);
}

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

.metric {
  padding: 14px;
}

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

.metric strong {
  display: block;
  margin-top: 6px;
  font-size: 22px;
}

.chart {
  width: 100%;
  min-height: 320px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

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

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

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

th,
td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  background: #fbfcfc;
}

td button {
  min-height: 32px;
  padding: 4px 10px;
}

.notice,
.footer {
  color: var(--muted);
  font-size: 13px;
}

.notice {
  margin-top: 14px;
  padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: #fff8ed;
}

.footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 34px;
  border-top: 1px solid var(--line);
}

.question {
  display: grid;
  gap: 8px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.question strong {
  font-size: 15px;
}

.options {
  display: grid;
  gap: 7px;
}

.option {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.option input {
  width: auto;
  min-height: auto;
}

.result-box {
  min-height: 180px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfc;
}

.result-box h3 {
  margin-bottom: 8px;
  font-size: 24px;
}

.docs-shell {
  display: grid;
  grid-template-columns: 282px minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: 78px;
  max-height: calc(100vh - 92px);
  overflow: auto;
  padding: 4px 0 18px;
}

.docs-sidebar-title {
  margin: 0 0 14px;
  color: var(--text);
  font-size: 20px;
}

.docs-nav-group {
  margin-bottom: 18px;
}

.docs-nav-group strong {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.docs-nav-group a {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
}

.docs-nav-group span {
  display: block;
  padding: 7px 10px;
  color: #9aa7a1;
  font-size: 14px;
}

.docs-nav-group a.active,
.docs-nav-group a:hover {
  color: var(--brand);
  background: var(--surface-2);
}

.docs-article {
  max-width: 860px;
  padding-bottom: 44px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumbs a {
  color: var(--brand);
}

.docs-article h1 {
  margin-bottom: 12px;
  font-size: clamp(34px, 4.8vw, 54px);
}

.docs-intro {
  max-width: 760px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 18px;
}

.copy-action {
  display: inline-flex;
  margin-bottom: 24px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 700;
}

.in-this-article {
  margin: 0 0 28px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.in-this-article h2 {
  margin-bottom: 8px;
  font-size: 18px;
}

.in-this-article ul {
  margin: 0;
  padding-left: 20px;
}

.in-this-article li {
  margin: 6px 0;
}

.docs-section {
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.docs-section h2 {
  margin-bottom: 10px;
  font-size: 28px;
}

.docs-section h3 {
  margin: 22px 0 8px;
  font-size: 18px;
}

.docs-section p,
.docs-section li {
  color: #2d3a35;
}

.docs-section ol,
.docs-section ul {
  margin: 0 0 14px 22px;
  padding: 0;
}

.docs-section li {
  margin: 8px 0;
}

.docs-note {
  margin: 16px 0;
  padding: 14px 16px;
  border-left: 4px solid var(--brand);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: #eef7f4;
  color: #263630;
}

.docs-warning {
  margin: 16px 0;
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: #fff8ed;
  color: #443020;
}

.docs-footer-nav {
  display: flex;
  justify-content: flex-end;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.docs-next {
  display: block;
  min-width: 220px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

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

.docs-next strong {
  display: block;
  margin-top: 3px;
  color: var(--brand);
}

.docs-next.disabled strong {
  color: var(--muted);
}

.guide-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.guide-toc {
  position: sticky;
  top: 88px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.guide-toc h2 {
  margin-bottom: 10px;
  font-size: 17px;
}

.guide-toc a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  font-size: 14px;
}

.guide-toc a:hover {
  color: var(--brand);
}

.guide-content {
  display: grid;
  gap: 16px;
}

.guide-step {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.guide-step h2 {
  margin-bottom: 10px;
  font-size: 23px;
}

.guide-step h3 {
  margin: 18px 0 8px;
  font-size: 17px;
}

.guide-step ol,
.guide-step ul {
  margin: 0 0 12px 20px;
  padding: 0;
}

.guide-step li {
  margin: 7px 0;
}

.code-block {
  overflow-x: auto;
  margin: 12px 0;
  padding: 14px;
  border: 1px solid #cbd7d2;
  border-radius: var(--radius);
  color: #d8efe8;
  background: #13211d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.55;
}

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

.check-item {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfc;
}

@media (max-width: 920px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero,
  .dashboard,
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .guide-toc {
    position: static;
    max-height: none;
  }

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

@media (max-width: 620px) {
  .main {
    width: min(100% - 22px, 1180px);
    padding-top: 18px;
  }

  .hero-copy,
  .market-board {
    min-height: auto;
  }

  h1 {
    font-size: 38px;
  }

  .tool-grid,
  .metrics,
  .chart-grid,
  .form-grid,
  .ticker-grid,
  .docs-shell {
    grid-template-columns: 1fr;
  }

  .docs-sidebar {
    position: static;
    max-height: none;
  }

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

  .nav a {
    padding-inline: 8px;
  }
}