:root {
      --bg: #f6fbf7;
      --surface: #ffffff;
      --ink: #10201a;
      --muted: #5f7168;
      --line: #d8eadf;
      --green: #008c3a;
      --green-2: #00a64a;
      --green-3: #dff5e7;
      --dark: #07130e;
      --shadow: 0 28px 80px rgba(0, 70, 32, 0.12);
      --radius-xl: 34px;
      --radius-lg: 22px;
      --max: 1180px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at top left, rgba(0, 166, 74, .12), transparent 34rem),
        linear-gradient(180deg, #fbfffc 0%, var(--bg) 48%, #ffffff 100%);
      line-height: 1.6;
    }

    a { color: inherit; text-decoration: none; }
    .container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

    .nav {
      position: sticky;
      top: 0;
      z-index: 40;
      border-bottom: 1px solid rgba(216, 234, 223, .82);
      background: rgba(246, 251, 247, .82);
      backdrop-filter: blur(18px);
    }

    .nav-inner {
      height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      letter-spacing: -0.04em;
    }

    .brand-logo {
      width: 42px;
      height: 42px;
      object-fit: contain;
    }

    .brand-text strong { display: block; line-height: 1; font-size: 1.05rem; }
    .brand-text span { display: block; color: var(--muted); font-size: .74rem; letter-spacing: .01em; margin-top: 3px; }

    .nav-links {
      display: flex;
      gap: 24px;
      align-items: center;
      color: var(--muted);
      font-size: .94rem;
      font-weight: 700;
    }

    .nav-links a {
      display: inline-flex;
      align-items: center;
      line-height: 1;
    }

    .nav-links a:hover, .nav-links a.active { color: var(--green); }

    .nav-art {
      display: block;
      width: 80px;
      height: 80px;
      object-fit: contain;
      flex: 0 0 80px;
    }

    .nav-item {
      position: relative;
      display: inline-flex;
      align-items: center;
    }

    .submenu {
      position: absolute;
      top: 100%;
      left: 50%;
      transform: translateX(-50%);
      display: none;
      min-width: 104px;
      padding: 8px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: var(--surface);
      box-shadow: 0 14px 32px rgba(0,0,0,.08);
      z-index: 60;
    }

    .nav-item:hover .submenu,
    .nav-item:focus-within .submenu {
      display: grid;
      gap: 4px;
    }

    .submenu a {
      padding: 8px 10px;
      border-radius: 10px;
      white-space: nowrap;
    }

    .submenu a:hover {
      background: var(--green-soft);
      text-decoration: none;
    }

    .page-hero {
      padding: 94px 0 64px;
      position: relative;
      overflow: hidden;
      isolation: isolate;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      z-index: 0;
      background-image: url("../images/research/background.png");
      background-position: right max(20px, calc((100vw - var(--max)) / 2)) top 20px;
      background-size: min(570px, 45vw) auto;
      background-repeat: no-repeat;
      opacity: .36;
      -webkit-mask-image: linear-gradient(225deg, #000 0%, rgba(0,0,0,.78) 34%, rgba(0,0,0,.30) 68%, transparent 96%);
      mask-image: linear-gradient(225deg, #000 0%, rgba(0,0,0,.78) 34%, rgba(0,0,0,.30) 68%, transparent 96%);
      pointer-events: none;
    }

    .page-hero::after {
      content: "";
      position: absolute;
      inset: 0;
      z-index: 0;
      background:
        linear-gradient(135deg, rgba(246, 251, 247, .96) 0%, rgba(246, 251, 247, .72) 42%, rgba(246, 251, 247, .18) 100%),
        linear-gradient(180deg, rgba(246, 251, 247, 0) 0%, rgba(246, 251, 247, .20) 76%, var(--bg) 100%);
      pointer-events: none;
    }

    .page-hero .container {
      position: relative;
      z-index: 1;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,.78);
      color: var(--green);
      border-radius: 999px;
      padding: 8px 13px;
      font-weight: 900;
      font-size: .84rem;
      letter-spacing: .03em;
    }

    .dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--green-2);
      box-shadow: 0 0 0 6px rgba(0,166,74,.12);
    }

    h1 {
      max-width: 920px;
      margin: 22px 0 20px;
      font-size: clamp(3rem, 6.5vw, 6.6rem);
      line-height: .92;
      letter-spacing: -.045em;
      color: var(--dark);
    }

    .highlight { color: var(--green); }
    .lead {
      max-width: 780px;
      margin: 0;
      color: var(--muted);
      font-size: clamp(1.05rem, 1.55vw, 1.25rem);
    }

    section { padding: 72px 0; }
    .section-head {
      display: grid;
      gap: 26px;
      margin-bottom: 30px;
    }

    .kicker {
      color: var(--green);
      font-size: .76rem;
      font-weight: 950;
      text-transform: uppercase;
      letter-spacing: .14em;
    }

    h2 {
      margin: 8px 0 0;
      color: var(--dark);
      font-size: clamp(2rem, 2.85vw, 3.15rem);
      line-height: 1.08;
      letter-spacing: 0;
    }

    .collab-heading {
      font-size: clamp(2rem, 2.85vw, 3.15rem);
    }

    .collab-heading span {
      white-space: nowrap;
    }

    .theme-title-link {
      display: inline-block;
      transition: color .18s ease;
    }

    .theme-title-link:hover,
    .theme-title-link:focus-visible {
      color: var(--green);
    }

    .section-head p {
      width: 100%;
      max-width: none;
      margin: 0;
      color: var(--muted);
      line-height: 1.55;
    }

    .concept {
      background: var(--dark);
      color: white;
      border-radius: var(--radius-xl);
      padding: 44px;
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 34px;
      align-items: center;
      box-shadow: var(--shadow);
      overflow: hidden;
      position: relative;
    }

    .concept::after {
      content: "";
      position: absolute;
      width: 460px;
      height: 460px;
      right: -180px;
      top: -180px;
      border-radius: 999px;
      background: rgba(0,166,74,.24);
    }

    .concept > * { position: relative; z-index: 1; }
    .concept h2 { color: white; margin: 0 0 14px; }
    .concept-title {
      letter-spacing: 0;
      word-spacing: .04em;
      white-space: nowrap;
      font-size: clamp(2rem, 2.85vw, 3.15rem);
      line-height: 1.08;
    }
    .concept p { margin: 0; color: rgba(255,255,255,.74); }

    .interaction-map {
      min-height: 320px;
      display: grid;
      place-items: center;
      position: relative;
    }

    .interaction-map img {
      width: min(100%, 440px);
      height: auto;
      filter: drop-shadow(0 24px 60px rgba(0,0,0,.18));
    }

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

    .area-card {
      position: relative;
      display: block;
      aspect-ratio: 1 / 1;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: var(--dark);
      box-shadow: 0 14px 42px rgba(16,32,26,.08);
      cursor: pointer;
    }

    .area-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: filter .25s ease, transform .25s ease;
    }

    .area-card::after {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(7, 19, 14, .12);
      transition: background .25s ease;
      pointer-events: none;
    }

    .area-label {
      position: absolute;
      left: 50%;
      top: 50%;
      z-index: 2;
      transform: translate(-50%, -50%);
      display: grid;
      justify-items: center;
      gap: 10px;
      width: min(92%, 24rem);
      text-align: center;
      transition: opacity .2s ease, transform .2s ease;
    }

    .area-label span {
      color: white;
      font-size: clamp(2.2rem, 3.4vw, 3.7rem);
      font-weight: 950;
      line-height: .95;
      -webkit-text-stroke: 2px rgba(7, 19, 14, .95);
      text-shadow: 0 4px 18px rgba(0,0,0,.36);
    }

    .area-label em {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 18px;
      border-radius: 999px;
      background: rgba(255,255,255,.88);
      color: var(--dark);
      font-size: clamp(1.2rem, 1.85vw, 1.7rem);
      font-style: normal;
      font-weight: 950;
      line-height: 1;
      box-shadow: 0 8px 24px rgba(0,0,0,.22);
    }

    .area-card p {
      position: absolute;
      inset: 0;
      z-index: 3;
      display: grid;
      place-items: center;
      margin: 0;
      padding: 28px;
      color: white;
      background: rgba(7, 19, 14, .48);
      font-size: clamp(1.12rem, 1.45vw, 1.38rem);
      font-weight: 800;
      line-height: 1.42;
      text-align: center;
      opacity: 0;
      transition: opacity .25s ease;
    }

    .area-card:hover img,
    .area-card:focus img,
    .area-card:focus-visible img {
      filter: blur(5px);
      transform: scale(1.04);
    }

    .area-card:hover::after,
    .area-card:focus::after,
    .area-card:focus-visible::after {
      background: rgba(7, 19, 14, .28);
    }

    .area-card:hover p,
    .area-card:focus p,
    .area-card:focus-visible p {
      opacity: 1;
    }

    .area-card:hover .area-label,
    .area-card:focus .area-label,
    .area-card:focus-visible .area-label {
      opacity: 0;
      transform: translate(-50%, -48%);
    }

    .workflow {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }

    .step {
      display: grid;
      grid-template-rows: 220px auto 1fr;
      background: white;
      border: 1px solid var(--line);
      border-radius: 22px;
      padding: 24px;
      gap: 16px;
    }

    .step-image {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
      border-radius: 14px;
      background: white;
      padding: 16px;
      border: 1px solid rgba(0, 166, 74, .12);
    }

    .step-body {
      border-radius: 14px;
      background: rgba(224, 246, 233, .62);
      padding: 20px 22px 22px;
    }

    .step-body h3 {
      margin: 0 0 12px;
      color: var(--dark);
      font-size: clamp(1.12rem, 1.28vw, 1.34rem);
      line-height: 1.28;
      letter-spacing: 0;
    }

    .step-body p {
      margin: 0;
      color: var(--muted);
      font-size: 1.03rem;
      line-height: 1.6;
    }

    .step-refs {
      display: grid;
      gap: 10px;
      align-content: start;
    }

    .step-ref {
      border-top: 1px solid rgba(0, 166, 74, .16);
      padding-top: 10px;
      color: var(--muted);
      line-height: 1.35;
    }

    .step-ref strong {
      display: block;
      color: var(--dark);
      font-size: .98rem;
      line-height: 1.28;
    }

    .step-ref span {
      display: block;
      margin-top: 2px;
      color: var(--muted);
      font-size: .95rem;
      font-weight: 750;
    }

    .step-ref em {
      display: block;
      margin-top: 3px;
      color: var(--green);
      font-size: .9rem;
      font-style: normal;
      font-weight: 800;
    }

    .collab-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      grid-auto-rows: 1fr;
      align-items: stretch;
      gap: 18px;
    }

    .collab-card {
      display: grid;
      grid-template-rows: clamp(250px, 18vw, 320px) 1fr;
      background: rgba(224, 246, 233, .45);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 14px 42px rgba(16,32,26,.06);
    }

    .collab-card img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
      padding: 8px;
      background: white;
      border-bottom: 1px solid var(--line);
    }

    .collab-body {
      display: grid;
      align-content: start;
      gap: 9px;
      padding: 20px 22px 22px;
      background: transparent;
    }

    .collab-body h3 {
      margin: 0;
      color: var(--dark);
      font-size: clamp(1.12rem, 1.28vw, 1.34rem);
      line-height: 1.28;
      letter-spacing: 0;
    }

    .collab-body p {
      margin: 0;
      color: var(--muted);
      font-size: .94rem;
      line-height: 1.45;
      font-weight: 700;
    }

    .collab-body em {
      color: var(--green);
      font-size: .84rem;
      font-style: normal;
      font-weight: 800;
      line-height: 1.35;
    }

    .join {
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(0,140,58,.95), rgba(0,92,41,.96)),
        var(--green);
      color: white;
      padding: 44px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: center;
      gap: 24px;
      box-shadow: var(--shadow);
    }

    .join h2 {
      color: white;
      margin: 0 0 12px;
      font-size: clamp(2.1rem, 3.5vw, 3.65rem);
      line-height: .98;
      letter-spacing: 0;
    }

    .join p {
      max-width: 920px;
      margin: 0;
      color: rgba(255,255,255,.78);
    }

    .button {
      display: inline-flex;
      min-height: 50px;
      align-items: center;
      justify-content: center;
      border-radius: 999px;
      padding: 0 19px;
      font-weight: 900;
      border: 1px solid var(--line);
      background: white;
      color: var(--dark);
    }

    footer {
      border-top: 1px solid var(--line);
      padding: 42px 0;
      color: var(--muted);
    }
    .footer-inner { display: flex; justify-content: space-between; gap: 22px; flex-wrap: wrap; }

    @media (max-width: 920px) {
      .concept, .join { grid-template-columns: 1fr; }
      .interaction-map { min-height: 260px; }
      .interaction-map img { width: min(100%, 360px); }
      .research-grid, .workflow { grid-template-columns: repeat(2, 1fr); }
      .collab-grid { grid-template-columns: repeat(2, 1fr); }
      .collab-card {
        grid-template-rows: clamp(220px, 34vw, 300px) 1fr;
      }
      .nav-links { gap: 14px; font-size: .92rem; }
    }

    @media (max-width: 640px) {
      .container { width: min(100% - 28px, var(--max)); }
      .page-hero { padding: 58px 0 42px; }
      .page-hero::before {
        background-position: right 20px top;
        background-size: 430px auto;
      }
      .section-head { flex-direction: column; align-items: start; }
      .research-grid, .workflow, .collab-grid { grid-template-columns: 1fr; }
      .collab-card {
        grid-template-rows: clamp(220px, 62vw, 330px) auto;
      }
      .concept, .join { padding: 30px; }
      .interaction-map { min-height: 220px; }
      .interaction-map img { width: min(100%, 300px); }
      .concept-title { white-space: normal; }
      .collab-heading span { white-space: normal; }
      .brand-text span { display: none; }
    }