:root {
  --ink: #20221f;
  --muted: #686c64;
  --paper: #f7f4eb;
  --soft: #e8ece2;
  --leaf: #315f48;
  --mint: #8cc7b2;
  --sun: #efc24d;
  --clay: #be5b45;
  --blue: #76b8ce;
  --line: rgba(32, 34, 31, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Inter", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

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

.topbar {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 34px;
  background: rgba(247, 244, 235, 0.84);
  border-bottom: 1px solid rgba(32, 34, 31, 0.1);
  backdrop-filter: blur(18px);
}

.brand {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

nav {
  display: flex;
  gap: 20px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

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

.file-link {
  padding: 6px 10px;
  color: #fff;
  background: var(--leaf);
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  padding: 110px 34px 42px;
  overflow: hidden;
  color: #fff;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(20, 31, 25, 0.78), rgba(20, 31, 25, 0.22) 56%, rgba(20, 31, 25, 0.08));
}

.hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.02) contrast(0.96);
}

.hero-copy {
  position: relative;
  z-index: 1;
  width: min(880px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--clay);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #f6d163;
}

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

h1 {
  margin-bottom: 18px;
  max-width: 760px;
  font-size: clamp(46px, 8vw, 104px);
  line-height: 0.98;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4.5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: 0;
}

.lead {
  max-width: 650px;
  margin-bottom: 28px;
  font-size: clamp(17px, 2vw, 22px);
  color: rgba(255, 255, 255, 0.9);
}

.meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  max-width: 900px;
  margin: 0;
}

.meta div {
  min-height: 100px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
}

dt {
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
  font-weight: 800;
}

dd {
  margin: 0;
  font-size: 14px;
  font-weight: 750;
}

.band {
  padding: 92px 34px;
}

.light {
  background: #eef1e8;
}

.dark {
  color: #f8f3e6;
  background: #18251e;
}

.section-title {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: 40px;
  width: min(1220px, 100%);
  margin: 0 auto 42px;
  align-items: start;
}

.position-layout {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 34px;
  width: min(1220px, 100%);
  margin: 0 auto;
  align-items: stretch;
}

.intro-text {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  font-size: 18px;
}

.intro-text p {
  margin-bottom: 0;
  padding: 24px;
  background: #fff;
  border-left: 6px solid var(--clay);
  box-shadow: inset 0 0 0 1px var(--line);
}

.intro-text .budget-note {
  color: #fff;
  background: var(--leaf);
  border-left-color: var(--sun);
  font-size: 20px;
  font-weight: 850;
}

.analysis-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px minmax(0, 1fr) 34px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 24px;
  background: linear-gradient(135deg, rgba(140, 199, 178, 0.2), rgba(239, 194, 77, 0.16));
  border: 1px solid var(--line);
}

.diagram-column {
  min-height: 260px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(32, 34, 31, 0.12);
}

.diagram-column h3 {
  margin-bottom: 18px;
  color: var(--leaf);
  font-size: 18px;
}

.diagram-column span {
  display: block;
  margin-bottom: 10px;
  padding: 10px 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(32, 34, 31, 0.1);
  font-size: 14px;
  font-weight: 750;
}

.diagram-column.strong {
  background: var(--leaf);
}

.diagram-column.strong h3,
.diagram-column.strong span {
  color: #fff;
}

.diagram-column.strong span {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.18);
}

.diagram-arrow {
  color: var(--clay);
  font-size: 34px;
  font-weight: 900;
  text-align: center;
}

.concept-image {
  width: min(1220px, 100%);
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--line);
}

.concept-image img {
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #fff;
}

.concept-image figcaption {
  color: var(--muted);
  font-size: 15px;
}

.concept-support {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
  width: min(1220px, 100%);
  margin: 18px auto 0;
}

.concept-support article {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
}

.concept-head {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 8px 14px;
  color: #fff;
  background: var(--leaf);
  font-size: 14px;
  font-weight: 850;
}

.culture-head {
  background: linear-gradient(90deg, #c93635, #e67c2f);
}

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

.problem-photo-grid figure,
.culture-reference-grid figure {
  margin: 0;
  background: #f7f4eb;
  border: 1px solid rgba(32, 34, 31, 0.1);
}

.problem-photo-grid img {
  aspect-ratio: 4 / 3;
}

.culture-reference-grid img {
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #fff;
}

.problem-photo-grid figcaption,
.culture-reference-grid figcaption {
  padding: 10px 12px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 800;
}

.issue-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  width: min(1220px, 100%);
  margin: 0 auto;
}

.issue-grid article,
.strategy-list article {
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid var(--line);
}

.issue-grid article {
  display: flex;
  flex-direction: column;
}

.issue-grid img {
  aspect-ratio: 4 / 3;
}

.issue-grid span,
.strategy-list span {
  display: inline-flex;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  margin: 18px 18px 10px;
  color: #fff;
  background: var(--leaf);
  border-radius: 50%;
  font-size: 13px;
  font-weight: 850;
}

.issue-grid h3,
.issue-grid p,
.strategy-list h3,
.strategy-list p {
  padding: 0 18px;
}

.issue-grid p,
.strategy-list p {
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 15px;
}

.strategy-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  width: min(1220px, 100%);
  margin: 0 auto;
}

.strategy-list article:nth-child(2) span {
  background: var(--blue);
}

.strategy-list article:nth-child(3) span {
  background: var(--clay);
}

.strategy-list article:nth-child(4) span {
  background: #7c6a44;
}

.strategy-list article:nth-child(5) span {
  background: var(--sun);
  color: var(--ink);
}

.budget-strip {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  width: min(1220px, 100%);
  margin: 24px auto 0;
  padding: 26px 30px;
  color: #fff;
  background: var(--leaf);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.budget-strip strong {
  color: var(--sun);
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1;
  letter-spacing: 0;
}

.budget-strip span {
  font-size: 19px;
  font-weight: 750;
  line-height: 1.65;
}

.strategy-analysis {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  width: min(1220px, 100%);
  margin: 24px auto 0;
  padding: 26px;
  background:
    radial-gradient(circle at center, rgba(239, 194, 77, 0.32) 0 17%, transparent 18%),
    linear-gradient(135deg, rgba(140, 199, 178, 0.2), rgba(118, 184, 206, 0.16));
  border: 1px solid var(--line);
}

.analysis-core {
  grid-column: 2 / 5;
  justify-self: center;
  width: min(360px, 100%);
  padding: 24px;
  color: #fff;
  background: var(--leaf);
  text-align: center;
}

.analysis-core span {
  display: block;
  color: var(--sun);
  font-size: 13px;
  font-weight: 850;
}

.analysis-core strong {
  display: block;
  margin: 6px 0 8px;
  font-size: 54px;
  line-height: 1;
}

.analysis-core p {
  margin-bottom: 0;
  font-size: 15px;
}

.analysis-node {
  min-height: 112px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(32, 34, 31, 0.12);
  text-align: center;
}

.analysis-node b {
  display: block;
  margin-bottom: 10px;
  color: var(--clay);
  font-size: 22px;
}

.analysis-node span {
  color: var(--muted);
  font-weight: 750;
}

.impact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  width: min(1220px, 100%);
  margin: 0 auto;
  align-items: stretch;
}

.impact-layout figure {
  background: rgba(255, 255, 255, 0.08);
}

.impact-layout img {
  height: 100%;
  min-height: 520px;
  object-fit: cover;
}

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

.impact-list article {
  padding: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.impact-list span {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--ink);
  background: var(--sun);
  border-radius: 50%;
  font-weight: 900;
}

.impact-list h3 {
  color: #fff;
}

.impact-list p {
  margin-bottom: 0;
  color: rgba(248, 243, 230, 0.76);
}

.process-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 54px minmax(0, 1fr) 54px minmax(0, 1fr) 54px minmax(0, 1fr);
  align-items: center;
  width: min(1220px, 100%);
  margin: 28px auto 0;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
}

.process-step {
  min-height: 170px;
  padding: 22px;
  background: #f5f7ef;
  border-top: 6px solid var(--leaf);
}

.process-step:nth-of-type(3) {
  border-top-color: var(--blue);
}

.process-step:nth-of-type(5) {
  border-top-color: var(--clay);
}

.process-step:nth-of-type(7) {
  border-top-color: var(--sun);
}

.process-step span {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: #fff;
  background: var(--ink);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 850;
}

.process-step h3 {
  margin-bottom: 8px;
}

.process-step p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.process-line {
  height: 2px;
  background: linear-gradient(90deg, var(--leaf), var(--clay));
  position: relative;
}

.process-line::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -1px;
  width: 10px;
  height: 10px;
  border-top: 2px solid var(--clay);
  border-right: 2px solid var(--clay);
  transform: translateY(-50%) rotate(45deg);
}

.showcase,
.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  width: min(1220px, 100%);
  margin: 0 auto;
}

.showcase .wide {
  grid-column: 1 / -1;
}

figure {
  margin: 0;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
}

figure img {
  aspect-ratio: 16 / 10;
}

figcaption {
  padding: 14px 16px 18px;
  color: inherit;
  font-size: 14px;
}

.dark figcaption {
  color: rgba(248, 243, 230, 0.76);
}

.compare-grid figure {
  background: #fff;
  border: 1px solid var(--line);
}

.compare-grid figcaption {
  color: var(--muted);
}

.masonry {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  width: min(1220px, 100%);
  margin: 0 auto;
}

.masonry img {
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  background: #fff;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 34px;
  color: rgba(248, 243, 230, 0.78);
  background: #18251e;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 14px;
}

.footer p {
  margin: 0;
}

.footer a {
  font-weight: 800;
}

@media (max-width: 980px) {
  .meta,
  .issue-grid,
  .strategy-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-title,
  .position-layout,
  .intro-text {
    grid-template-columns: 1fr;
  }

  .analysis-diagram,
  .concept-support,
  .strategy-analysis,
  .impact-layout,
  .impact-list,
  .process-diagram {
    grid-template-columns: 1fr;
  }

  .budget-strip {
    grid-template-columns: 1fr;
  }

  .diagram-arrow {
    transform: rotate(90deg);
  }

  .diagram-column {
    min-height: auto;
  }

  .process-line {
    width: 2px;
    height: 36px;
    margin: 0 auto;
  }

  .process-line::after {
    top: auto;
    right: auto;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%) rotate(135deg);
  }
}

@media (max-width: 680px) {
  .topbar {
    position: absolute;
    align-items: flex-start;
    padding: 16px 18px;
    flex-wrap: wrap;
  }

  nav {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 10px 14px;
    width: 100%;
    font-size: 12px;
  }

  .hero {
    min-height: 96vh;
    padding: 92px 18px 28px;
  }

  .hero::after {
    background: linear-gradient(180deg, rgba(20, 31, 25, 0.54), rgba(20, 31, 25, 0.78));
  }

  .band {
    padding: 64px 18px;
  }

  .meta,
  .issue-grid,
  .strategy-list,
  .masonry,
  .showcase,
  .compare-grid {
    grid-template-columns: 1fr;
  }

  .meta div {
    min-height: auto;
  }

  .intro-text {
    font-size: 16px;
  }

  .analysis-core {
    grid-column: auto;
  }

  h1 {
    max-width: 100%;
    font-size: 36px;
    line-height: 1.08;
  }
}