@charset "utf-8";
:root {
  --bg: #101214;
  --bg-soft: #15181b;
  --surface: #1b1f23;
  --surface-2: #22272d;
  --surface-3: #2a3037;
  --ink: #eef2f3;
  --muted: #a4adb4;
  --subtle: #7b858e;
  --line: #343b43;
  --line-strong: #4b5660;
  --accent: #8fb5c4;
  --accent-2: #b7c7a3;
  --warm: #c4a47c;
  --danger: #c4928a;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(143, 181, 196, 0.12), transparent 32rem),
    linear-gradient(180deg, #101214 0%, #14171a 52%, #101214 100%);
  color: var(--ink);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(22px, calc((100% - var(--max)) / 2));
  background: rgba(16, 18, 20, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 700;
  color: var(--ink);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

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

main {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 18px;
  align-items: stretch;
  padding: 48px 0 22px;
}

.hero-copy,
.section-block,
.metrics-panel div,
.case-study,
.compact-project,
.solve-grid article {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(34, 39, 45, 0.92), rgba(27, 31, 35, 0.92));
  border-radius: 10px;
}

.hero-copy {
  padding: 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.25;
  letter-spacing: 0;
}

h1 {
  max-width: 900px;
  font-size: 42px;
}

h2 {
  font-size: 28px;
}

h3 {
  font-size: 20px;
}

h4 {
  color: var(--accent);
  font-size: 14px;
}

.lead {
  max-width: 900px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.hero-note {
  max-width: 900px;
  margin: 16px 0 0;
  color: var(--accent-2);
  font-size: 15px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 22px;
}

.hero-actions p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.primary-link-button {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  border: 1px solid rgba(143, 181, 196, 0.42);
  border-radius: 999px;
  padding: 0 18px;
  color: var(--ink);
  background: rgba(143, 181, 196, 0.12);
  font-size: 14px;
  font-weight: 700;
}

.primary-link-button:hover {
  border-color: rgba(143, 181, 196, 0.7);
  background: rgba(143, 181, 196, 0.18);
}

.role-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.role-strip span,
.status-chip,
.case-id,
.compact-head span {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0 10px;
  color: var(--accent);
  background: rgba(143, 181, 196, 0.08);
  font-size: 12px;
}

.metrics-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.metrics-panel div {
  display: flex;
  min-height: 128px;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
}

.metrics-panel strong {
  color: var(--ink);
  font-size: 38px;
  line-height: 1;
}

.metrics-panel span {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.section-block {
  margin: 18px 0;
  padding: 28px;
}

.section-heading {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}

.section-heading.wide {
  max-width: 900px;
}

.section-heading p:last-child {
  margin: 0;
  color: var(--muted);
}

.reading-path {
  display: grid;
  grid-template-columns: 0.42fr 1fr;
  gap: 24px;
  align-items: center;
  border-color: rgba(143, 181, 196, 0.26);
  background:
    linear-gradient(135deg, rgba(143, 181, 196, 0.10), rgba(183, 199, 163, 0.05)),
    rgba(18, 21, 24, 0.78);
}

.reading-path h2 {
  margin-bottom: 0;
  font-size: 28px;
}

.reading-path p:last-child {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.7;
}

.project-status {
  align-items: flex-start;
}

.about-copy {
  display: grid;
  gap: 14px;
}

.about-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.status-summary-list {
  margin: 0;
  padding-left: 20px;
  color: var(--ink);
}

.status-summary-list li + li {
  margin-top: 8px;
}

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

.solve-grid article {
  padding: 18px;
  background: rgba(34, 39, 45, 0.72);
}

.solve-grid h3 {
  font-size: 17px;
}

.ability-grid,
.method-cards {
  display: grid;
  gap: 12px;
}

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

.ability-grid article,
.method-cards article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(34, 39, 45, 0.72);
}

.ability-grid h3,
.method-cards h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.ability-grid p,
.method-cards p {
  margin: 0;
  color: var(--muted);
}

.method-cards {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 14px;
}

.solve-grid p,
.compact-project p,
.case-header p,
.case-narrative p {
  color: var(--muted);
}

.featured-stack {
  display: grid;
  gap: 18px;
}

.case-study {
  padding: 22px;
  border-color: var(--line-strong);
}

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

.case-header h3 {
  margin-top: 10px;
  font-size: 26px;
}

.case-header p {
  max-width: 760px;
  margin: 8px 0 0;
}

.status-chip {
  max-width: 260px;
  justify-content: center;
  border-radius: 6px;
  color: var(--accent-2);
  background: rgba(183, 199, 163, 0.08);
}

.status-stack {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  max-width: 360px;
}

.status-stack .status-chip {
  max-width: none;
}

.case-body {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: 20px;
  padding-top: 18px;
}

.case-narrative {
  display: grid;
  gap: 16px;
}

.case-narrative p {
  margin: 6px 0 0;
}

.stage-note {
  border: 1px solid rgba(196, 164, 124, 0.32);
  border-radius: 8px;
  background: rgba(196, 164, 124, 0.08);
  padding: 14px;
}

.stage-note p {
  color: #d8cec2;
}

.case-proof {
  border: 1px solid rgba(143, 181, 196, 0.36);
  border-radius: 10px;
  background:
    linear-gradient(135deg, rgba(143, 181, 196, 0.14), rgba(183, 199, 163, 0.06)),
    rgba(16, 18, 20, 0.72);
  padding: 16px;
}

.case-proof h4 {
  color: var(--accent);
}

.case-proof p {
  color: var(--ink);
  font-size: 17px;
  line-height: 1.65;
}

.case-flow {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 10px 12px;
  margin: 0;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.case-flow dt,
.compact-project dt {
  color: var(--accent);
  font-weight: 700;
}

.case-flow dd,
.compact-project dd {
  margin: 0;
  color: var(--muted);
}

.evidence-column {
  display: grid;
  gap: 18px;
}

.evidence-showcase {
  display: grid;
  gap: 16px;
}

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

.evidence-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(16, 18, 20, 0.62);
  padding: 18px;
}

.evidence-card--main {
  border-color: rgba(143, 181, 196, 0.58);
  background: linear-gradient(180deg, rgba(35, 43, 48, 0.95), rgba(16, 18, 20, 0.92));
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  padding: 22px;
}

.evidence-card--key {
  min-height: 320px;
}

.evidence-card--support {
  min-height: 0;
  padding: 14px;
  background: rgba(16, 18, 20, 0.42);
}

.evidence-card .evidence-visual {
  display: block;
  width: 100%;
  min-height: 220px;
  max-height: 260px;
  margin-top: 14px;
  border: 1px solid rgba(143, 181, 196, 0.18);
  border-radius: 8px;
  background: #0c0f11;
  object-fit: contain;
  padding: 10px;
}

.evidence-card--main .evidence-visual {
  min-height: 320px;
  max-height: 420px;
  border-color: rgba(143, 181, 196, 0.34);
  background:
    linear-gradient(180deg, rgba(143, 181, 196, 0.08), rgba(16, 18, 20, 0.45)),
    #0c0f11;
  padding: 14px;
}

.evidence-card--support .evidence-visual {
  min-height: 150px;
  max-height: 180px;
}

.evidence-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.evidence-type {
  color: var(--warm);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.evidence-card .evidence-badge {
  border: 1px solid rgba(143, 181, 196, 0.35);
  border-radius: 999px;
  padding: 2px 8px;
  color: var(--accent);
  background: rgba(143, 181, 196, 0.08);
  white-space: nowrap;
  font-size: 12px;
}

.evidence-card h5 {
  margin: 12px 0 0;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.28;
}

.evidence-card--main h5 {
  font-size: 26px;
}

.evidence-card p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.evidence-card .evidence-proof {
  margin-top: 14px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}

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

.evidence-card--support h5 {
  font-size: 16px;
}

.evidence-card--support p {
  font-size: 13px;
}

.evidence-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.evidence-links a {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border: 1px solid rgba(143, 181, 196, 0.32);
  border-radius: 999px;
  padding: 0 10px;
  color: var(--accent);
  background: rgba(143, 181, 196, 0.08);
  font-size: 12px;
}

.evidence-more {
  border: 1px solid rgba(75, 86, 96, 0.75);
  border-radius: 8px;
  background: rgba(16, 18, 20, 0.28);
  padding: 14px;
}

.evidence-more summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

.secondary-evidence-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 14px;
}

.secondary-evidence-list .evidence-card {
  border-style: solid;
}

.secondary-evidence-list .evidence-links {
  margin-top: 10px;
}

.evidence-workflow {
  border-color: rgba(143, 181, 196, 0.56);
}

.evidence-table {
  border-color: rgba(183, 199, 163, 0.5);
  background:
    linear-gradient(90deg, rgba(183, 199, 163, 0.05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(183, 199, 163, 0.05) 1px, transparent 1px),
    rgba(16, 18, 20, 0.62);
  background-size: 22px 22px;
}

.evidence-input {
  border-color: rgba(143, 181, 196, 0.44);
  background: linear-gradient(180deg, rgba(143, 181, 196, 0.08), rgba(16, 18, 20, 0.58));
}

.evidence-output {
  border-color: rgba(196, 164, 124, 0.5);
  background: linear-gradient(180deg, rgba(196, 164, 124, 0.08), rgba(16, 18, 20, 0.58));
}

.evidence-review {
  border-color: rgba(196, 146, 138, 0.45);
  background: linear-gradient(180deg, rgba(196, 146, 138, 0.08), rgba(16, 18, 20, 0.58));
}

.evidence-boundary {
  border-color: rgba(196, 164, 124, 0.36);
  background: rgba(54, 46, 36, 0.42);
}

.evidence-boundary .evidence-proof {
  color: #d8cec2;
}

.split-section {
  display: grid;
  grid-template-columns: 0.38fr 0.62fr;
  gap: 22px;
}

.compact-grid {
  display: grid;
  gap: 12px;
}

.compact-project {
  padding: 18px;
  background: rgba(34, 39, 45, 0.7);
}

.compact-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.compact-tagline {
  margin: 10px 0 12px;
}

.compact-project dl {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 8px 12px;
  margin: 0;
  font-size: 14px;
}

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

.method-list li {
  border-left: 2px solid var(--accent);
  background: rgba(16, 18, 20, 0.38);
  padding: 16px;
}

.method-list span {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.method-list h3 {
  margin-top: 10px;
  font-size: 17px;
}

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

.boundary-section {
  display: grid;
  grid-template-columns: 0.34fr 0.66fr;
  gap: 24px;
  border-color: rgba(196, 164, 124, 0.38);
  background: linear-gradient(180deg, rgba(54, 46, 36, 0.55), rgba(29, 31, 32, 0.92));
}

.boundary-section p:last-child {
  margin: 0;
  color: #d4ccc1;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 36px;
  color: var(--subtle);
  font-size: 13px;
}

@media (max-width: 980px) {
  .hero-section,
  .reading-path,
  .case-body,
  .split-section,
  .boundary-section {
    grid-template-columns: 1fr;
  }

  .solve-grid,
  .method-list,
  .ability-grid,
  .method-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-body {
    gap: 26px;
  }
}

@media (max-width: 680px) {
  main,
  .site-footer {
    width: min(100% - 28px, var(--max));
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  h1 {
    font-size: 32px;
  }

  .ability-grid,
  .method-cards,
  .solve-grid,
  .method-list {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .section-block,
  .case-study {
    padding: 18px;
  }

  .metrics-panel,
  .solve-grid,
  .method-list,
  .key-evidence-grid,
  .case-flow,
  .compact-project dl {
    grid-template-columns: 1fr;
  }

  .evidence-card--main .evidence-visual,
  .evidence-card .evidence-visual {
    min-height: 210px;
    max-height: 280px;
  }

  .evidence-card--main h5 {
    font-size: 22px;
  }

  .case-header {
    flex-direction: column;
  }
}