:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #64717d;
  --line: #d9e0e6;
  --paper: #ffffff;
  --soft: #f4f7f8;
  --band: #edf4f2;
  --teal: #0d6b64;
  --teal-dark: #084943;
  --red: #b6423c;
  --gold: #b6842d;
  --green: #376f43;
  --blue: #315f8c;
  --shadow: 0 14px 34px rgba(23, 32, 42, 0.08);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

a {
  color: var(--teal-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--red);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.header-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  color: var(--ink);
  text-decoration: none;
  min-width: 230px;
}

.brand strong {
  font-size: 18px;
  line-height: 1.2;
}

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

.main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
  flex-wrap: wrap;
}

.main-nav a {
  color: var(--ink);
  text-decoration: none;
  padding: 9px 10px;
  border-radius: 6px;
  font-size: 14px;
}

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

.page-hero {
  background:
    linear-gradient(90deg, rgba(13, 107, 100, 0.10), rgba(182, 66, 60, 0.05)),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 68px 0 38px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 46px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--red);
  font-weight: 700;
  font-size: 13px;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--red);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.22;
}

h1 {
  font-size: clamp(36px, 5vw, 66px);
  max-width: 870px;
  letter-spacing: 0;
}

h2 {
  font-size: clamp(26px, 3vw, 38px);
}

h3 {
  font-size: 21px;
}

.lead {
  margin: 20px 0 0;
  color: #40505e;
  font-size: 18px;
  max-width: 760px;
}

.hero-credit {
  margin: 16px 0 0;
  color: var(--teal-dark);
  font-size: 15px;
  font-weight: 700;
  max-width: 760px;
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 16px;
  border-radius: 6px;
  border: 1px solid var(--teal-dark);
  text-decoration: none;
  font-weight: 700;
}

.button {
  color: #fff;
  background: var(--teal-dark);
}

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

.button-secondary {
  color: var(--teal-dark);
  background: transparent;
}

.button-secondary:hover {
  color: #fff;
  background: var(--teal-dark);
}

.hero-visual {
  min-height: 360px;
}

.hero-visual img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 22px 28px rgba(23, 32, 42, 0.14));
}

.section {
  padding: 64px 0;
}

.section.band {
  background: var(--soft);
}

.section.band-green {
  background: var(--band);
}

.section-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-heading p {
  color: var(--muted);
  margin: 10px 0 0;
  max-width: 720px;
}

.capability-grid,
.theme-grid,
.source-grid,
.evidence-grid {
  display: grid;
  gap: 16px;
}

.capability-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

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

.card,
.capability-card,
.source-card,
.evidence-card,
.compare-card,
.theme-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.capability-card,
.source-card,
.evidence-card,
.compare-card,
.theme-card {
  padding: 20px;
}

.capability-card {
  box-shadow: none;
  border-top: 4px solid var(--teal);
}

.capability-card:nth-child(2) {
  border-top-color: var(--red);
}

.capability-card:nth-child(3) {
  border-top-color: var(--gold);
}

.capability-card:nth-child(4) {
  border-top-color: var(--green);
}

.capability-card:nth-child(5) {
  border-top-color: var(--blue);
}

.capability-card p,
.theme-card p,
.source-card p,
.evidence-card p,
.compare-card p {
  color: var(--muted);
  margin: 10px 0 0;
}

.theme-card {
  display: flex;
  flex-direction: column;
  min-height: 285px;
}

.theme-card .meta {
  color: var(--red);
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 12px;
}

.theme-card ul {
  margin: 14px 0 18px;
  padding-left: 20px;
  color: #40505e;
}

.theme-card .link-row {
  margin-top: auto;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 8px;
  border-radius: 6px;
  background: #edf4f2;
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 700;
}

.quote-panel {
  border-left: 4px solid var(--red);
  background: #fff;
  padding: 24px;
  border-radius: 0 8px 8px 0;
  box-shadow: var(--shadow);
}

.quote-panel p {
  margin: 0;
  color: #334350;
  font-size: 18px;
}

.quote-panel cite {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-style: normal;
  font-size: 14px;
}

.page-title {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
  padding: 54px 0 36px;
}

.page-title .lead {
  max-width: 850px;
}

.theme-page .page-title {
  width: min(1180px, calc(100% - 40px));
}

.theme-layout {
  display: grid;
  grid-template-columns: minmax(220px, 270px) minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

.side-nav {
  position: sticky;
  top: 96px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.side-nav a {
  display: block;
  text-decoration: none;
  padding: 9px 10px;
  border-radius: 6px;
  color: #334350;
  font-size: 14px;
}

.side-nav a:hover {
  background: var(--soft);
  color: var(--teal-dark);
}

.content-panel {
  display: grid;
  gap: 28px;
}

.analysis-block {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

.analysis-block p {
  margin: 12px 0 0;
  color: #40505e;
}

.analysis-block ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: #40505e;
}

.evidence-card h3 {
  font-size: 18px;
}

.source-card {
  box-shadow: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.source-card .type {
  color: var(--red);
  font-weight: 800;
  font-size: 13px;
}

.source-card h3 {
  font-size: 18px;
}

.source-card .publisher {
  color: var(--muted);
  font-size: 13px;
}

.source-card a {
  margin-top: auto;
  font-weight: 700;
}

.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.filter-button {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 6px;
  min-height: 36px;
  padding: 7px 10px;
  font: inherit;
  cursor: pointer;
}

.filter-button[aria-pressed="true"] {
  background: var(--teal-dark);
  border-color: var(--teal-dark);
  color: #fff;
}

.timeline {
  position: relative;
  display: grid;
  gap: 14px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 90px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  position: relative;
}

.timeline-date {
  color: var(--teal-dark);
  font-weight: 900;
}

.timeline-content {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.timeline-content::before {
  content: "";
  position: absolute;
  left: 84px;
  top: 9px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--red);
  border: 3px solid #fff;
  box-shadow: 0 0 0 1px var(--line);
}

.compare-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 980px;
}

.compare-table th,
.compare-table td {
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
}

.compare-table th {
  background: #edf4f2;
  color: var(--teal-dark);
  font-size: 14px;
}

.compare-table td:first-child {
  font-weight: 900;
  color: var(--red);
}

.compare-table tr:last-child td {
  border-bottom: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #152027;
  color: #dce6ec;
}

.footer-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-inner a {
  color: #dce6ec;
}

.footer-note {
  margin: 8px 0 0;
  color: #aebdc6;
  font-size: 13px;
}

.note {
  color: var(--muted);
  font-size: 14px;
}

.compact-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.compact-list li {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.kpi-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.kpi {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fff;
}

.kpi strong {
  display: block;
  color: var(--teal-dark);
  font-size: 24px;
  line-height: 1.2;
}

.kpi span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 1040px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 0;
    max-width: 640px;
  }

  .capability-grid,
  .theme-grid,
  .source-grid,
  .evidence-grid,
  .kpi-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .theme-layout {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
  }
}

@media (max-width: 760px) {
  .header-inner {
    width: min(100% - 28px, 1180px);
    min-height: auto;
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .brand {
    min-width: 0;
  }

  .main-nav {
    justify-content: flex-start;
    width: 100%;
  }

  .main-nav a {
    padding: 7px 8px;
    font-size: 13px;
  }

  .hero-inner,
  .section-inner,
  .page-title,
  .theme-page .page-title,
  .footer-inner {
    width: calc(100% - 28px);
  }

  .hero-inner {
    padding: 44px 0 28px;
    gap: 26px;
  }

  h1 {
    font-size: 34px;
  }

  .lead {
    font-size: 16px;
  }

  .section {
    padding: 44px 0;
  }

  .section-heading {
    display: block;
  }

  .capability-grid,
  .theme-grid,
  .source-grid,
  .evidence-grid,
  .kpi-strip {
    grid-template-columns: 1fr;
  }

  .theme-card {
    min-height: auto;
  }

  .timeline::before,
  .timeline-content::before {
    display: none;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .analysis-block {
    padding: 22px;
  }
}