:root {
  --ink: #2B2925;
  --ink-deep: #171613;
  --lime: #B99A58;
  --lime-hover: #D1B672;
  --cyan: #8A7652;
  --amber: #C7A45D;
  --blue: #6E6A61;
  --paper: #F7F4EE;
  --panel: #FFFFFF;
  --grid: #EFE7D7;
  --text: #282621;
  --muted: #6F685D;
  --on-dark: #F4FAF8;
  --on-dark-muted: #E8DDC8;
  --line: #DED3BE;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: Arial, "Microsoft YaHei", sans-serif;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 32px;
  color: var(--text);
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(43, 41, 37, 0.06);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 20px;
  font-weight: 900;
  white-space: nowrap;
}

.brand img {
  width: 92px;
  height: auto;
  display: block;
}

.brand-mark {
  width: 28px;
  height: 20px;
  border: 4px solid var(--lime);
  border-right-width: 9px;
  border-radius: 5px;
  position: relative;
  flex: 0 0 auto;
}

.brand-mark::after {
  content: "";
  position: absolute;
  right: -13px;
  top: 5px;
  width: 10px;
  height: 5px;
  background: var(--panel);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex: 1;
  min-width: 0;
  font-size: 14px;
  font-weight: 800;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.nav a:hover {
  color: var(--lime);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: flex-end;
}

.login {
  color: var(--text);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.language {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 900;
}

.menu-toggle {
  display: none;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 13px;
  font-weight: 900;
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn-small {
  min-height: 42px;
  padding: 0 20px;
  font-size: 14px;
}

.btn-primary {
  color: #FFFFFF;
  background: var(--lime);
  box-shadow: 0 12px 34px rgba(185, 154, 88, 0.28);
}

.btn-primary:hover {
  background: var(--lime-hover);
}

.btn-secondary {
  color: var(--on-dark);
  border-color: rgba(244, 250, 248, 0.34);
  background: rgba(255, 255, 255, 0.03);
}

.hero .btn-primary,
.diagnosis .btn-primary {
  color: var(--ink);
  background: #FFFFFF;
  box-shadow: 0 12px 34px rgba(43, 41, 37, 0.16);
}

.hero .btn-primary:hover,
.diagnosis .btn-primary:hover {
  background: #F7F4EE;
}

.container {
  width: min(100% - 48px, 1200px);
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 70px);
  color: var(--on-dark);
  background:
    radial-gradient(circle at 80% 18%, rgba(255, 255, 255, 0.18), transparent 34%),
    linear-gradient(135deg, #B99A58 0%, #9F8248 48%, #6E5832 100%);
  overflow: hidden;
}

.page-hero {
  color: var(--on-dark);
  background:
    radial-gradient(circle at 82% 12%, rgba(255, 255, 255, 0.16), transparent 34%),
    linear-gradient(135deg, #B99A58 0%, #9F8248 46%, #5E4A29 100%);
}

.page-hero-inner {
  min-height: 430px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 78px 0;
}

.page-hero h1 {
  max-width: 820px;
  margin: 24px 0 20px;
  font-size: 58px;
  line-height: 1.08;
}

.page-hero p {
  max-width: 760px;
  color: var(--on-dark-muted);
  font-size: 19px;
  line-height: 1.8;
}

.hero-inner {
  width: min(100% - 48px, 1240px);
  min-height: calc(100vh - 70px);
  margin: 0 auto;
  padding: 80px 0 70px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(430px, 0.95fr);
  gap: 60px;
  align-items: center;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow,
.kicker {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  color: var(--lime);
  font-size: 13px;
  font-weight: 900;
}

.eyebrow {
  gap: 8px;
  padding: 7px 12px;
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
  background: rgba(43, 41, 37, 0.12);
}

.eyebrow span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #FFFFFF;
}

.kicker {
  margin-bottom: 16px;
  color: var(--cyan);
}

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

h1 {
  margin-bottom: 22px;
  font-size: 64px;
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 680px;
  color: var(--on-dark-muted);
  font-size: 20px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 36px;
}

.hero-note {
  margin: 34px 0 0;
  color: rgba(244, 250, 248, 0.74);
  font-size: 14px;
  line-height: 1.7;
}

.system-panel {
  min-height: 520px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    rgba(43, 41, 37, 0.72);
  background-size: 28px 28px;
  box-shadow: 0 36px 80px rgba(0, 0, 0, 0.24);
  overflow: hidden;
}

.panel-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.panel-top span {
  color: var(--lime);
  font-size: 13px;
  font-weight: 900;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 30px;
}

.metric-card {
  padding: 17px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.metric-card strong {
  display: block;
  margin-bottom: 9px;
  color: var(--on-dark);
  font-size: 28px;
  line-height: 1;
}

.metric-card span {
  color: var(--on-dark-muted);
  font-size: 12px;
}

.progress-list {
  display: grid;
  gap: 15px;
}

.progress-row {
  display: grid;
  grid-template-columns: 92px 1fr 62px;
  gap: 14px;
  align-items: center;
  color: var(--on-dark);
  font-size: 13px;
  font-weight: 900;
}

.progress-row div {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.progress-row i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #FFFFFF, var(--lime-hover));
}

.progress-row b {
  color: var(--lime);
  text-align: right;
}

.node-map {
  position: relative;
  height: 185px;
  margin-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.node {
  position: absolute;
  width: 112px;
  padding: 12px;
  color: var(--on-dark);
  border: 1px solid rgba(184, 243, 49, 0.36);
  border-radius: 8px;
  background: rgba(6, 47, 58, 0.88);
  font-size: 12px;
  font-weight: 900;
  text-align: center;
}

.node small {
  display: block;
  margin-top: 5px;
  color: var(--on-dark-muted);
  font-size: 11px;
  font-weight: 600;
}

.node-sku { left: 0; top: 42px; }
.node-box { left: 31%; top: 98px; border-color: rgba(45, 155, 173, 0.65); }
.node-cost { right: 24%; top: 36px; border-color: rgba(212, 167, 44, 0.65); }
.node-process { right: 0; top: 108px; }

.line {
  position: absolute;
  height: 1px;
  transform-origin: left center;
  background: rgba(184, 243, 49, 0.42);
}

.line-one { left: 104px; top: 94px; width: 118px; transform: rotate(20deg); }
.line-two { left: 260px; top: 122px; width: 112px; transform: rotate(-30deg); background: rgba(45, 155, 173, 0.48); }
.line-three { right: 106px; top: 97px; width: 116px; transform: rotate(28deg); background: rgba(212, 167, 44, 0.44); }

.section {
  padding: 88px 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 38px;
}

.section-heading h2 {
  margin-bottom: 16px;
  color: var(--text);
  font-size: 42px;
  line-height: 1.18;
  font-weight: 900;
}

.section-heading p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.split-heading {
  display: flex;
  max-width: none;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
}

.split-heading div {
  max-width: 720px;
}

.split-heading p {
  max-width: 420px;
}

.problem {
  background: var(--grid);
}

.outcome-band {
  background: var(--panel);
}

.outcome-card {
  min-height: 165px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 26px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--lime);
  border-radius: 8px;
  background: var(--paper);
}

.outcome-card strong {
  color: var(--ink);
  font-size: 42px;
  line-height: 1;
}

.outcome-card span {
  color: var(--muted);
  line-height: 1.55;
  font-weight: 800;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.comparison-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.comparison-card > span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.comparison-card h3 {
  margin-bottom: 22px;
  font-size: 26px;
  line-height: 1.3;
}

.comparison-card ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.65;
}

.comparison-card.featured {
  color: var(--on-dark);
  background: var(--ink);
  border-color: var(--ink);
}

.comparison-card.featured > span {
  color: var(--lime-hover);
}

.comparison-card.featured h3 {
  color: var(--on-dark);
}

.comparison-card.featured ul {
  color: var(--on-dark-muted);
}

.chain {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  margin: 30px 0 34px;
}

.chain-step {
  position: relative;
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 900;
}

.chain-step:not(:last-child)::after {
  content: "->";
  position: absolute;
  right: -19px;
  color: var(--cyan);
  z-index: 2;
}

.chain-step.highlight {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.two-col {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 30px;
  align-items: stretch;
}

.two-col p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}

.insight-card {
  padding: 26px;
  background: var(--ink);
  color: var(--on-dark);
  border-radius: 8px;
}

.insight-card strong {
  display: block;
  margin-bottom: 12px;
  font-size: 22px;
  line-height: 1.35;
}

.insight-card span {
  color: var(--on-dark-muted);
  line-height: 1.75;
}

.cards {
  display: grid;
  gap: 20px;
}

.cards.three {
  grid-template-columns: repeat(3, 1fr);
}

.cards.four {
  grid-template-columns: repeat(4, 1fr);
}

.card,
.case-card,
.principle,
.flow-grid article,
.diagnosis-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.card {
  padding: 26px;
}

.method-card {
  border-top: 4px solid var(--lime);
}

.card-code {
  display: inline-flex;
  margin-bottom: 20px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.method-card h3,
.resource-card h3,
.scenario-card h3,
.principle h3,
.flow-grid h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.3;
  font-weight: 900;
}

.method-card strong {
  display: block;
  margin-bottom: 12px;
  color: var(--muted);
}

.card p,
.principle p,
.flow-grid p,
.case-card p {
  color: var(--muted);
  line-height: 1.75;
}

.resource-map {
  color: var(--on-dark);
  background: linear-gradient(135deg, var(--ink) 0%, #4E4028 100%);
}

.resource-map h2 {
  color: var(--on-dark);
}

.resource-map .section-heading p {
  color: var(--on-dark-muted);
}

.resource-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.13);
}

.resource-card h3,
.resource-card p,
.resource-card li {
  color: var(--on-dark);
}

.resource-card p,
.resource-card li {
  color: var(--on-dark-muted);
}

.resource-card ul {
  margin: 20px 0 0;
  padding-left: 18px;
}

.resource-dot {
  display: block;
  width: 12px;
  height: 12px;
  margin-bottom: 22px;
  border-radius: 50%;
  background: var(--cyan);
}

.resource-card.amber .resource-dot {
  background: var(--amber);
}

.resource-card.blue .resource-dot {
  background: var(--blue);
}

.scenario-card span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.cases {
  background: var(--grid);
}

.text-link {
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
}

.case-card {
  padding: 0;
  overflow: hidden;
}

.case-top {
  padding: 24px;
  color: var(--on-dark);
  background: linear-gradient(135deg, var(--ink) 0%, #5A482C 100%);
}

.case-top span {
  display: block;
  margin-bottom: 12px;
  color: var(--lime);
  font-size: 13px;
  font-weight: 900;
}

.case-top h3 {
  margin: 0;
  font-size: 26px;
}

.case-card p {
  margin: 20px 24px 0;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px;
}

.tags span,
.footer-keywords span {
  display: inline-flex;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--grid);
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  counter-reset: step;
}

.flow-grid article {
  padding: 24px;
}

.flow-grid span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--lime);
  background: var(--ink);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 900;
}

.why {
  background: var(--panel);
}

.principle {
  padding: 24px;
}

.diagnosis {
  color: var(--on-dark);
  background:
    radial-gradient(circle at 20% 10%, rgba(184, 243, 49, 0.14), transparent 34%),
    linear-gradient(135deg, var(--ink) 0%, var(--ink-deep) 100%);
}

.diagnosis-inner {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 56px;
  align-items: start;
}

.diagnosis h2 {
  color: var(--on-dark);
  font-size: 42px;
  line-height: 1.18;
}

.diagnosis-copy p,
.diagnosis-copy li {
  color: var(--on-dark-muted);
  font-size: 17px;
  line-height: 1.75;
}

.diagnosis-copy ul {
  margin-top: 24px;
  padding-left: 20px;
}

.diagnosis-form {
  display: grid;
  gap: 16px;
  padding: 28px;
}

.honeypot {
  display: none;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field label {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 13px;
  font-weight: 900;
}

.field input,
.field textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--text);
  font: inherit;
}

.field input:focus,
.field textarea:focus {
  outline: 2px solid rgba(45, 155, 173, 0.32);
  border-color: var(--cyan);
}

.form-submit {
  width: 100%;
  border: 0;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.footer {
  padding: 44px 0;
  color: var(--on-dark);
  background: var(--ink-deep);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.1fr;
  gap: 32px;
  align-items: start;
}

.footer-brand {
  margin-bottom: 14px;
}

.footer p {
  margin: 0;
  color: var(--on-dark-muted);
}

.footer-links,
.footer-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a {
  color: var(--on-dark-muted);
  text-decoration: none;
}

.footer-keywords span {
  background: rgba(255, 255, 255, 0.08);
  color: var(--on-dark);
}

.footer-contact p {
  margin-bottom: 8px;
  color: var(--on-dark-muted);
  font-size: 13px;
  line-height: 1.55;
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.filter-tags span {
  display: inline-flex;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  font-weight: 900;
}

.filter-tags .active {
  color: #FFFFFF;
  background: var(--lime);
  border-color: var(--lime);
}

.case-list {
  display: grid;
  gap: 22px;
}

.case-detail-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  overflow: hidden;
}

.case-detail-head {
  padding: 28px;
  color: var(--on-dark);
  background: linear-gradient(135deg, var(--ink) 0%, #5A482C 100%);
}

.case-detail-head span {
  display: block;
  margin-bottom: 12px;
  color: var(--lime-hover);
  font-size: 13px;
  font-weight: 900;
}

.case-detail-head h3 {
  margin: 0;
  font-size: 32px;
}

.case-detail-body {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 22px;
  padding: 28px;
}

.case-detail-body h4 {
  margin: 0 0 10px;
  font-size: 16px;
}

.case-detail-body p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.resource-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.resource-pills span {
  display: inline-flex;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--grid);
  color: var(--ink);
  font-size: 12px;
  font-weight: 900;
}

.case-method {
  background: var(--grid);
}

.case-method-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 50px;
  align-items: start;
}

.case-method h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.18;
}

.method-checks {
  display: grid;
  gap: 12px;
}

.method-checks p {
  margin: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  line-height: 1.7;
}

.method-checks p:last-child {
  color: var(--on-dark);
  background: var(--ink);
  border-color: var(--ink);
}

.case-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
}

.case-cta h2 {
  max-width: 720px;
  color: var(--on-dark);
  font-size: 42px;
  line-height: 1.18;
}

.case-cta p {
  max-width: 700px;
  color: var(--on-dark-muted);
  line-height: 1.8;
}

.resource-page {
  background: var(--paper);
}

.resource-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.resource-item {
  min-height: 310px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.resource-item .resource-dot {
  margin-bottom: 18px;
}

.resource-item h3 {
  margin-bottom: 12px;
  font-size: 23px;
  line-height: 1.28;
}

.resource-item p {
  color: var(--muted);
  line-height: 1.75;
}

.resource-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.resource-meta span {
  display: inline-flex;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--grid);
  color: var(--ink);
  font-size: 12px;
  font-weight: 900;
}

.scenario-band {
  background: var(--grid);
}

.scenario-band-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 50px;
  align-items: start;
}

.scenario-band h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.18;
}

.scenario-list {
  display: grid;
  gap: 14px;
}

.scenario-list p {
  margin: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  line-height: 1.7;
}

.related-case-strip {
  color: var(--on-dark);
  background: linear-gradient(135deg, var(--ink) 0%, #4E4028 100%);
}

.related-case-strip h2 {
  color: var(--on-dark);
}

.related-case-strip p {
  color: var(--on-dark-muted);
}

.related-case-strip .text-link {
  color: var(--lime-hover);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.article-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  overflow: hidden;
}

.article-cover {
  min-height: 170px;
  display: flex;
  align-items: flex-end;
  padding: 22px;
  color: var(--on-dark);
  background:
    linear-gradient(rgba(43, 41, 37, 0.2), rgba(43, 41, 37, 0.5)),
    linear-gradient(135deg, #B99A58 0%, #6E5832 100%);
  font-size: 22px;
  font-weight: 900;
}

.article-body {
  padding: 24px;
}

.article-body > span {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.article-body h3 {
  margin-bottom: 12px;
  font-size: 22px;
  line-height: 1.35;
}

.article-body p {
  color: var(--muted);
  line-height: 1.75;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 13px;
}

.article-meta a {
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
}

@media (max-width: 1180px) {
  .nav {
    gap: 17px;
    font-size: 13px;
  }

  .login,
  .language {
    display: none;
  }

  h1 {
    font-size: 54px;
  }
}

@media (max-width: 960px) {
  .site-header {
    padding: 0 20px;
    position: sticky;
  }

  .nav {
    position: absolute;
    top: 64px;
    left: 20px;
    right: 20px;
    display: none;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: 0 22px 50px rgba(43, 41, 37, 0.14);
    font-size: 15px;
    text-align: left;
  }

  .nav.is-open {
    display: grid;
  }

  .nav a {
    padding: 13px 12px;
    border-radius: 6px;
  }

  .nav a:hover {
    background: var(--paper);
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .hero-inner,
  .two-col,
  .comparison-grid,
  .diagnosis-inner,
  .case-method-inner,
  .scenario-band-inner {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding: 58px 0;
  }

  .cards.three,
  .flow-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cards.four {
    grid-template-columns: 1fr 1fr;
  }

  .chain {
    grid-template-columns: 1fr;
  }

  .chain-step:not(:last-child)::after {
    content: "↓";
    right: auto;
    bottom: -24px;
    top: auto;
  }

  .split-heading {
    display: block;
  }

  .split-heading p {
    max-width: none;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .case-detail-body {
    grid-template-columns: 1fr;
  }

  .case-cta-inner {
    display: block;
  }

  .case-cta .btn {
    margin-top: 24px;
  }

  .resource-list {
    grid-template-columns: 1fr 1fr;
  }

  .article-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .container,
  .hero-inner {
    width: min(100% - 40px, 1200px);
  }

  .site-header {
    height: 64px;
  }

  .brand {
    font-size: 17px;
  }

  .header-actions {
    gap: 8px;
  }

  .header-actions .btn {
    min-height: 38px;
    padding: 0 14px;
    font-size: 13px;
  }

  .hero {
    min-height: auto;
  }

  h1 {
    font-size: 36px;
  }

  .page-hero h1 {
    font-size: 36px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .system-panel {
    min-height: 480px;
    padding: 20px;
  }

  .metric-grid,
  .cards.three,
  .cards.four,
  .flow-grid,
  .field-row,
  .resource-list,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .progress-row {
    grid-template-columns: 82px 1fr 56px;
  }

  .section {
    padding: 58px 0;
  }

  .section-heading h2,
  .diagnosis h2,
  .case-method h2,
  .case-cta h2,
  .scenario-band h2 {
    font-size: 30px;
  }

  .node {
    width: 96px;
  }

  .node-box {
    left: 19%;
  }

  .node-cost {
    right: 18%;
  }

  .node-process {
    top: 120px;
  }
}