:root {
  --ink: #10251f;
  --ink-soft: #315048;
  --teal: #146b5a;
  --teal-dark: #0c4c40;
  --lime: #cdeb5a;
  --sky: #4a90c2;
  --coral: #ff8f7a;
  --sand: #f7f5ee;
  --paper: #fffefa;
  --line: rgba(16, 37, 31, 0.16);
  --shadow: 0 24px 70px rgba(16, 37, 31, 0.11);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --content: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  background: var(--sand);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 20;
  width: min(calc(100% - 40px), var(--content));
  min-height: 78px;
  margin: 18px auto 0;
  padding: 12px 14px 12px 20px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  background: rgba(255, 254, 250, 0.88);
  border: 1px solid rgba(16, 37, 31, 0.1);
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(16, 37, 31, 0.05);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 1.22rem;
  font-weight: 850;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  width: 31px;
  height: 26px;
  display: inline-block;
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  height: 2px;
  background: var(--ink);
  transform-origin: left center;
}

.brand-mark::before {
  width: 21px;
  left: 4px;
  top: 7px;
  transform: rotate(27deg);
}

.brand-mark::after {
  width: 23px;
  left: 4px;
  bottom: 6px;
  transform: rotate(-23deg);
}

.brand-mark span {
  position: absolute;
  z-index: 1;
  width: 9px;
  height: 9px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--lime);
}

.brand-mark span:nth-child(1) { left: 0; top: 1px; }
.brand-mark span:nth-child(2) { right: 0; top: 9px; background: var(--coral); }
.brand-mark span:nth-child(3) { left: 4px; bottom: 0; background: #d7eaf5; }

.site-nav {
  justify-self: center;
  display: flex;
  gap: 28px;
}

.site-nav a,
.text-link {
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover,
.text-link:hover {
  color: var(--teal);
}

.header-actions,
.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.language-button {
  padding: 8px;
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 700;
}

.language-menu {
  position: relative;
}

.language-menu summary {
  padding: 8px;
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}

.language-menu summary::-webkit-details-marker {
  display: none;
}

.language-menu summary::after {
  content: "⌄";
  margin-left: 7px;
}

.language-menu[open] summary::after {
  content: "⌃";
}

.language-menu > div {
  position: absolute;
  z-index: 30;
  top: calc(100% + 10px);
  right: 0;
  min-width: 148px;
  padding: 8px;
  display: grid;
  gap: 2px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(16, 37, 31, 0.14);
}

.language-menu a {
  padding: 9px 10px;
  border-radius: 9px;
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.language-menu a:hover,
.language-menu a[aria-current="page"] {
  color: var(--ink);
  background: rgba(205, 235, 90, 0.32);
}

.button {
  min-height: 50px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-small {
  min-height: 42px;
  padding-inline: 18px;
  font-size: 0.88rem;
}

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

.button-primary {
  color: var(--ink);
  background: var(--lime);
  box-shadow: 0 12px 30px rgba(154, 188, 56, 0.24);
}

.button-light {
  color: var(--ink);
  background: #fff;
}

.hero {
  position: relative;
  width: min(calc(100% - 40px), var(--content));
  min-height: 680px;
  margin: 0 auto;
  padding: 92px 0 78px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.86fr);
  align-items: center;
  gap: 54px;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  width: 560px;
  height: 560px;
  right: -150px;
  top: -120px;
  background: radial-gradient(circle, rgba(205, 235, 90, 0.27), rgba(205, 235, 90, 0) 67%);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--teal);
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.16em;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 770px;
  margin: 0;
  font-size: clamp(3rem, 6vw, 5.9rem);
  line-height: 0.99;
  letter-spacing: -0.065em;
}

h1 span {
  position: relative;
  display: inline-block;
  color: var(--teal);
}

h1 span::after {
  content: "";
  position: absolute;
  z-index: -1;
  height: 0.16em;
  left: 0.04em;
  right: -0.04em;
  bottom: 0.04em;
  border-radius: 999px;
  background: var(--lime);
}

.hero-lead {
  max-width: 680px;
  margin: 32px 0 30px;
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.55vw, 1.28rem);
  line-height: 1.75;
}

.principle-list {
  margin: 40px 0 0;
  padding: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  border-top: 1px solid var(--line);
  list-style: none;
}

.principle-list li {
  position: relative;
  padding-left: 16px;
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.principle-list li::before {
  content: "";
  position: absolute;
  width: 7px;
  height: 7px;
  left: 0;
  top: 0.36em;
  border-radius: 50%;
  background: var(--coral);
}

.hero-visual {
  position: relative;
  min-height: 530px;
  border: 1px solid rgba(16, 37, 31, 0.12);
  border-radius: 42% 58% 51% 49% / 48% 42% 58% 52%;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.84), rgba(232, 240, 234, 0.74)),
    var(--paper);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: morph 12s ease-in-out infinite alternate;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(16, 37, 31, 0.1) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(circle, #000 10%, transparent 72%);
}

.hero-visual svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.network-lines path {
  stroke: var(--teal);
  stroke-width: 5;
}

.network-lines .network-dashed {
  stroke: var(--coral);
  stroke-width: 3;
  stroke-dasharray: 7 11;
}

.network-lines .network-fine {
  stroke: var(--sky);
  stroke-width: 2.5;
}

.network-nodes circle,
.network-core,
.network-sparks {
  transform-box: fill-box;
  transform-origin: center;
}

.network-nodes circle:nth-child(odd) { animation: node-pulse 5s ease-in-out infinite alternate; }
.network-nodes circle:nth-child(even) { animation: node-pulse 5s 1.3s ease-in-out infinite alternate-reverse; }
.network-core { animation: core-breathe 4s ease-in-out infinite; }

.visual-caption {
  position: absolute;
  z-index: 3;
  padding: 9px 13px;
  color: var(--ink);
  background: rgba(255, 254, 250, 0.9);
  border: 1px solid rgba(16, 37, 31, 0.13);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(16, 37, 31, 0.08);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.06em;
}

.visual-caption-top { left: 8%; top: 15%; }
.visual-caption-right { right: 4%; top: 35%; }
.visual-caption-bottom { right: 14%; bottom: 10%; }

.method-section {
  padding: 110px max(20px, calc((100vw - var(--content)) / 2)) 100px;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(300px, 0.85fr) minmax(340px, 0.72fr);
  justify-content: space-between;
  align-items: end;
  gap: 70px;
}

.section-heading .eyebrow,
.impact-section .eyebrow {
  color: var(--lime);
}

.section-heading h2,
.impact-section h2,
.pilot-section h2 {
  margin: 0;
  font-size: clamp(2.5rem, 5vw, 5.2rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.section-heading > p {
  margin: 0 0 4px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 1.05rem;
  line-height: 1.8;
}

.method-flow {
  margin-top: 68px;
  display: grid;
  grid-template-columns: 1fr 34px 1fr 34px 1fr;
  align-items: stretch;
}

.method-card {
  position: relative;
  min-width: 0;
  padding: 22px 22px 24px;
  color: var(--ink);
  background: var(--paper);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.method-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 28px 78px rgba(0, 0, 0, 0.26);
}

.card-topline {
  display: flex;
  justify-content: space-between;
  color: var(--ink-soft);
  font-size: 0.67rem;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.icon-stage {
  position: relative;
  min-height: 210px;
  margin: 14px 0 10px;
  display: grid;
  place-items: center;
  border-radius: 19px;
  overflow: hidden;
}

.icon-stage::before {
  content: "";
  position: absolute;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background: rgba(205, 235, 90, 0.25);
  filter: blur(1px);
}

.method-card-direct .icon-stage::before { background: rgba(74, 144, 194, 0.18); }
.method-card-cocreate .icon-stage::before { background: rgba(255, 143, 122, 0.19); }

.icon-stage img {
  position: relative;
  z-index: 1;
  width: min(74%, 178px);
  height: auto;
  filter: drop-shadow(0 14px 20px rgba(16, 37, 31, 0.1));
}

.method-card h3 {
  margin: 0;
  font-size: 1.65rem;
  letter-spacing: -0.03em;
}

.method-card h3 small {
  margin-top: 7px;
  display: block;
  color: var(--teal);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.method-card > p {
  min-height: 7.2em;
  margin: 18px 0;
  color: var(--ink-soft);
  font-size: 0.91rem;
  line-height: 1.75;
}

.evidence-chip {
  padding: 12px 13px;
  color: var(--teal-dark);
  background: #edf4e3;
  border-radius: 12px;
  font-size: 0.74rem;
  font-weight: 800;
  line-height: 1.45;
}

.flow-bridge {
  position: relative;
  display: grid;
  place-items: center;
}

.flow-bridge::before {
  content: "";
  width: 100%;
  height: 2px;
  background: rgba(205, 235, 90, 0.56);
}

.flow-bridge span {
  position: absolute;
  right: 0;
  width: 8px;
  height: 8px;
  border-top: 2px solid var(--lime);
  border-right: 2px solid var(--lime);
  transform: rotate(45deg);
}

.responsibility-rail {
  margin-top: 32px;
  padding: 22px 26px;
  display: grid;
  grid-template-columns: repeat(7, auto);
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 18px;
}

.responsibility-rail p {
  margin: 0;
}

.responsibility-rail strong,
.responsibility-rail span {
  display: block;
}

.responsibility-rail strong {
  color: #fff;
  font-size: 0.78rem;
}

.responsibility-rail span {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.7rem;
}

.responsibility-rail i {
  color: var(--lime);
  font-style: normal;
}

.product-section {
  padding: 112px max(20px, calc((100vw - var(--content)) / 2));
  background: var(--sand);
}

.product-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.6fr);
  align-items: end;
  gap: 80px;
}

.product-heading h2,
.trust-heading h2 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(2.55rem, 5vw, 5.1rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.product-heading > p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.8;
}

.product-grid {
  margin-top: 62px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.product-card {
  position: relative;
  min-height: 310px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  grid-column: span 2;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
}

.product-card:nth-child(4),
.product-card:nth-child(5) {
  grid-column: span 3;
  min-height: 270px;
}

.product-card::after {
  content: "";
  position: absolute;
  width: 130px;
  height: 130px;
  right: -70px;
  bottom: -70px;
  border: 22px solid rgba(74, 144, 194, 0.12);
  border-radius: 50%;
}

.product-card:nth-child(even)::after {
  border-color: rgba(255, 143, 122, 0.15);
}

.product-index {
  color: var(--ink-soft);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.status-badge {
  align-self: flex-start;
  margin-top: 24px;
  padding: 7px 10px;
  color: var(--teal-dark);
  background: #e8f2dd;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-research {
  color: #154e73;
  background: #dfedf7;
}

.product-card h3 {
  margin: auto 0 12px;
  font-size: 1.35rem;
}

.product-card p {
  position: relative;
  z-index: 1;
  min-height: 3.3em;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.87rem;
  line-height: 1.65;
}

.impact-section {
  padding: 110px max(20px, calc((100vw - var(--content)) / 2));
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.65fr);
  gap: 100px;
  background: var(--coral);
}

.impact-copy p:last-child {
  max-width: 760px;
  margin: 28px 0 0;
  font-size: 1.05rem;
  line-height: 1.8;
}

.impact-principles {
  align-self: end;
  border-top: 1px solid rgba(16, 37, 31, 0.35);
}

.impact-principles div {
  padding: 21px 0;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 8px;
  border-bottom: 1px solid rgba(16, 37, 31, 0.35);
}

.impact-principles span {
  font-size: 0.74rem;
  font-weight: 900;
}

.impact-principles strong {
  line-height: 1.5;
}

.trust-section {
  padding: 112px max(20px, calc((100vw - var(--content)) / 2));
  background: var(--paper);
}

.trust-heading {
  max-width: 850px;
}

.trust-grid {
  margin-top: 62px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.trust-card {
  min-height: 280px;
  padding: 28px 24px 30px;
  border-right: 1px solid var(--line);
}

.trust-card:first-child {
  border-left: 1px solid var(--line);
}

.trust-card > span {
  color: var(--coral);
  font-size: 0.7rem;
  font-weight: 900;
}

.trust-card h3 {
  margin: 82px 0 14px;
  font-size: 1.15rem;
}

.trust-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.7;
}

.pilot-section {
  width: min(calc(100% - 40px), var(--content));
  margin: 80px auto;
  padding: clamp(38px, 6vw, 72px);
  display: grid;
  grid-template-columns: 1fr 0.8fr auto;
  align-items: end;
  gap: 54px;
  color: #fff;
  background: var(--teal);
  border-radius: var(--radius-xl);
}

.pilot-section .eyebrow { color: var(--lime); }
.pilot-section h2 { font-size: clamp(2.4rem, 4vw, 4.5rem); }
.pilot-section > p { margin: 0; color: rgba(255, 255, 255, 0.74); line-height: 1.7; }

.site-footer {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  padding: 30px 0 46px;
  display: flex;
  align-items: center;
  gap: 28px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.site-footer p:nth-last-child(1) { margin-left: auto; }

.footer-note {
  max-width: 360px;
}

.footer-locales {
  margin-left: auto;
  display: flex;
  gap: 12px;
}

.footer-locales a {
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 700;
  text-decoration: none;
}

.footer-locales a[aria-current="page"] {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.not-found {
  min-height: 100vh;
  padding: 12vw max(24px, calc((100vw - 900px) / 2));
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.not-found h1 {
  max-width: 800px;
}

.not-found > p:not(.eyebrow) {
  margin: 28px 0;
  color: var(--ink-soft);
  font-size: 1.1rem;
}

@keyframes morph {
  from { border-radius: 42% 58% 51% 49% / 48% 42% 58% 52%; }
  to { border-radius: 56% 44% 43% 57% / 42% 55% 45% 58%; }
}

@keyframes node-pulse {
  from { transform: translateY(0) scale(1); }
  to { transform: translateY(-6px) scale(1.04); }
}

@keyframes core-breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

@media (max-width: 1040px) {
  .site-nav { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .hero { grid-template-columns: 1fr; padding-top: 72px; }
  .hero-copy { max-width: 850px; }
  .hero-visual { width: min(100%, 680px); min-height: 540px; justify-self: center; }
  .method-flow { grid-template-columns: 1fr; gap: 18px; }
  .flow-bridge { min-height: 26px; }
  .flow-bridge::before { width: 2px; height: 100%; }
  .flow-bridge span { right: auto; bottom: 1px; transform: rotate(135deg); }
  .method-card > p { min-height: 0; }
  .responsibility-rail { grid-template-columns: 1fr 1fr; }
  .responsibility-rail i { display: none; }
  .product-heading { grid-template-columns: 1fr; gap: 28px; }
  .product-card { grid-column: span 3; }
  .product-card:nth-child(5) { grid-column: 2 / span 4; }
  .impact-section { grid-template-columns: 1fr; gap: 48px; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .trust-card:nth-child(3) { border-left: 1px solid var(--line); }
  .trust-card:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .pilot-section { grid-template-columns: 1fr; align-items: start; }
  .pilot-section .button { justify-self: start; }
  .site-footer { flex-wrap: wrap; }
  .footer-locales { width: 100%; margin-left: 0; }
}

@media (max-width: 700px) {
  .site-header {
    width: min(calc(100% - 24px), var(--content));
    margin-top: 12px;
    padding: 10px 12px 10px 14px;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
  }
  .brand { min-width: 0; }
  .header-actions { gap: 6px; }
  .header-actions .button-small { display: none; }
  .language-button { display: none; }
  .language-menu summary { max-width: 86px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
  .hero { width: min(calc(100% - 28px), var(--content)); padding-top: 62px; gap: 42px; }
  .hero-copy { min-width: 0; }
  h1 {
    max-width: 100%;
    font-size: clamp(2.45rem, 12.4vw, 3.35rem);
    letter-spacing: -0.05em;
    overflow-wrap: anywhere;
  }
  h1 span { display: inline; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .principle-list { gap: 10px 16px; }
  .hero-visual { min-height: 390px; border-radius: 30px; animation: none; }
  .visual-caption { font-size: 0.58rem; padding: 7px 10px; }
  .method-section { padding-top: 78px; padding-bottom: 74px; }
  .section-heading { grid-template-columns: 1fr; gap: 26px; }
  .section-heading h2 { font-size: 3.3rem; }
  .method-flow { margin-top: 42px; }
  .icon-stage { min-height: 180px; }
  .responsibility-rail { grid-template-columns: 1fr; }
  .product-section, .trust-section { padding-top: 76px; padding-bottom: 76px; }
  .product-grid { grid-template-columns: 1fr; margin-top: 42px; }
  .product-card,
  .product-card:nth-child(4),
  .product-card:nth-child(5) { grid-column: auto; min-height: 250px; }
  .impact-section { padding-top: 76px; padding-bottom: 76px; }
  .trust-grid { grid-template-columns: 1fr; }
  .trust-card,
  .trust-card:first-child,
  .trust-card:nth-child(3) { min-height: 230px; border-left: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .trust-card:last-child { border-bottom: 0; }
  .trust-card h3 { margin-top: 48px; }
  .pilot-section { width: calc(100% - 28px); margin: 42px auto; border-radius: 24px; }
  .site-footer { width: calc(100% - 28px); align-items: flex-start; flex-direction: column; gap: 10px; }
  .site-footer p { margin: 0; }
  .site-footer p:nth-last-child(1) { margin-left: 0; }
  .footer-locales { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 3px solid var(--sky);
  outline-offset: 4px;
}