:root {
  --bg: #ffffff;
  --ink: #152018;
  --muted: #667066;
  --soft: #f5f7f4;
  --line: #dfe5dc;
  --line-strong: #c5d0c2;
  --green: #173f2a;
  --green-2: #496b55;
  --green-soft: #e9f0e7;
  --gold: #9a7a36;
  --danger: #8b3f35;
  --shadow: 0 18px 50px rgba(23, 63, 42, 0.08);
  --radius: 6px;
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(223, 229, 220, 0.86);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-width: 190px;
}

.brand-name {
  font-weight: 760;
  font-size: 22px;
  line-height: 1;
}

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

.nav {
  display: flex;
  gap: 28px;
  align-items: center;
  color: #364236;
  font-size: 14px;
}

.nav a {
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a[aria-current="page"] {
  border-color: var(--green);
  color: var(--green);
}

.main {
  overflow: hidden;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 24px;
}

.section-tight {
  padding-top: 42px;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  min-height: 650px;
  padding: 74px 24px 34px;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  gap: 48px;
  align-items: center;
}

.hero h1,
.case-hero h1 {
  margin: 0;
  font-size: 58px;
  line-height: 1.08;
  font-weight: 780;
  color: var(--green);
}

.hero p,
.case-hero .lead {
  margin: 24px 0 0;
  max-width: 720px;
  color: #334034;
  font-size: 21px;
  line-height: 1.75;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--green);
  border-radius: var(--radius);
  background: var(--green);
  color: #fff;
  font-size: 14px;
  font-weight: 680;
}

.button.secondary {
  background: #fff;
  color: var(--green);
}

.hero-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.mini-map {
  display: grid;
}

.mini-row {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.mini-row:last-child {
  border-bottom: 0;
}

.mark {
  width: 34px;
  height: 34px;
  border-radius: 5px;
  display: grid;
  place-items: center;
  background: var(--green);
  color: #fff;
  font-size: 15px;
  font-weight: 760;
}

.mini-title {
  font-weight: 720;
  font-size: 15px;
}

.mini-desc {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.stage {
  color: var(--green);
  font-size: 12px;
  white-space: nowrap;
}

.section-title {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 16px;
}

.section-title h2 {
  margin: 0;
  font-size: 30px;
  line-height: 1.2;
}

.section-title p {
  margin: 0;
  max-width: 620px;
  color: var(--muted);
}

.project-table {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
}

.project-row {
  display: grid;
  grid-template-columns: minmax(220px, 1.15fr) 150px minmax(220px, 1fr) minmax(260px, 1.05fr) 148px;
  gap: 0;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.project-row.header {
  background: var(--soft);
  color: var(--muted);
  font-size: 13px;
  font-weight: 680;
}

.project-row:last-child {
  border-bottom: 0;
}

.project-row > div {
  padding: 16px 18px;
  border-right: 1px solid var(--line);
}

.project-row > div:last-child {
  border-right: 0;
}

.project-name {
  font-weight: 740;
}

.project-type {
  color: var(--green-2);
  font-size: 13px;
  margin-top: 5px;
}

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

.progress {
  height: 6px;
  margin-top: 8px;
  background: var(--green-soft);
  border-radius: 99px;
  overflow: hidden;
}

.progress span {
  display: block;
  height: 100%;
  background: var(--green);
}

.row-link {
  color: var(--green);
  font-weight: 720;
}

.muted-link {
  color: var(--muted);
}

.evidence-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 18px;
}

.evidence-nav {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--soft);
}

.evidence-nav div {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--green);
  font-weight: 680;
}

.evidence-nav div:last-child {
  border-bottom: 0;
}

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

.artifact {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

.artifact img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--soft);
  border-bottom: 1px solid var(--line);
}

.artifact.phone img {
  aspect-ratio: 9 / 12;
  object-position: top;
}

.artifact-text {
  padding: 13px 14px 15px;
}

.artifact-title {
  font-weight: 720;
  font-size: 14px;
}

.artifact-meta {
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.category {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--soft);
}

.category h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.category ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.category li + li {
  margin-top: 7px;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.case-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 52px 24px 34px;
}

.breadcrumbs {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 28px;
}

.case-meta {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.case-layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 24px 72px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 24px;
  align-items: start;
}

.case-main {
  display: grid;
  gap: 18px;
}

.case-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 22px;
}

.case-block.media {
  padding: 0;
  overflow: hidden;
}

.case-block.media img {
  width: 100%;
  aspect-ratio: 16 / 8.4;
  object-fit: cover;
}

.case-block h2 {
  margin: 0 0 14px;
  font-size: 22px;
  line-height: 1.25;
}

.case-block h3 {
  margin: 20px 0 8px;
  font-size: 16px;
}

.case-block p {
  color: #3d483d;
  margin: 0;
}

.case-block p + p {
  margin-top: 12px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.path-list {
  display: grid;
  gap: 12px;
}

.path-item {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.path-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.path-label {
  color: var(--green);
  font-weight: 760;
}

.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.flow-step {
  border: 1px solid var(--line);
  background: var(--soft);
  border-radius: var(--radius);
  padding: 14px;
  min-height: 96px;
}

.flow-title {
  font-weight: 740;
}

.flow-desc {
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
}

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

.screenshot-grid img {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  aspect-ratio: 9 / 15;
  object-fit: cover;
  object-position: top;
}

.wide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.wide-grid img {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top;
}

.side-rail {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 14px;
}

.rail-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--soft);
}

.rail-block h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

.rail-list {
  display: grid;
  gap: 10px;
}

.rail-item {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  color: #3d483d;
  font-size: 13px;
}

.rail-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.warning {
  color: var(--danger);
}

@media (max-width: 980px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    gap: 20px;
    padding-bottom: 2px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 52px;
  }

  .hero h1,
  .case-hero h1 {
    font-size: 42px;
  }

  .hero p,
  .case-hero .lead {
    font-size: 18px;
  }

  .project-row,
  .project-row.header {
    grid-template-columns: 1fr;
  }

  .project-row.header {
    display: none;
  }

  .project-row > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .project-row > div:last-child {
    border-bottom: 0;
  }

  .evidence-grid,
  .category-grid,
  .case-layout,
  .two-col,
  .wide-grid {
    grid-template-columns: 1fr;
  }

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

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

  .side-rail {
    position: static;
  }
}

@media (max-width: 560px) {
  .section,
  .case-layout {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero,
  .case-hero {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero h1,
  .case-hero h1 {
    font-size: 34px;
  }

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

  .mini-row {
    grid-template-columns: 34px 1fr;
  }

  .mini-row .stage {
    grid-column: 2;
  }

  .evidence-strip,
  .screenshot-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
  }
}