:root {
  --bg: #f7f6f2;
  --ink: #102326;
  --muted: #526468;
  --teal: #01696f;
  --teal-dark: #004b50;
  --card: #ffffff;
  --line: #d9dedb;
  --soft: #eef4f3;
  --amber: #d99b42;
  --amber-soft: #fff7e8;
  --shadow: 0 16px 42px rgba(16,35,38,.06);
  --max: 1120px;
  --wide: 1280px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

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

header {
  border-bottom: 1px solid var(--line);
  background: rgba(247,246,242,.94);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 750;
  letter-spacing: -.02em;
  color: var(--ink);
  flex: 0 0 auto;
}

.mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--teal);
  display: grid;
  place-items: center;
  color: var(--bg);
  font-size: 15px;
  font-weight: 800;
  flex: 0 0 auto;
}

.links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  font-size: 14px;
  min-width: 0;
}

.links a {
  color: var(--muted);
  font-weight: 600;
}

.links a.active {
  color: var(--teal);
}

.links .contact-link {
  border: 1px solid var(--teal);
  border-radius: 999px;
  padding: 7px 11px;
  color: var(--teal);
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 84px 24px 44px;
}

.hero.wide,
section.wide {
  max-width: var(--max);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0,.82fr) minmax(500px,1.18fr);
  gap: 38px;
  align-items: center;
}

.eyebrow {
  color: var(--teal);
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  margin-bottom: 16px;
}

h1 {
  font-size: clamp(40px,6vw,72px);
  line-height: .96;
  letter-spacing: -.06em;
  margin: 0 0 22px;
  max-width: 900px;
}

h1 em {
  color: var(--teal);
  font-style: normal;
}

h2 {
  font-size: clamp(30px,4vw,48px);
  line-height: 1;
  letter-spacing: -.045em;
  margin: 0 0 18px;
}

h3 {
  margin: 0 0 10px;
  font-size: 22px;
  letter-spacing: -.025em;
  line-height: 1.15;
}

p { color: var(--muted); }

.lead {
  font-size: 20px;
  color: var(--muted);
  max-width: 860px;
  margin: 0 0 28px;
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 750;
  border: 1px solid var(--teal);
  background: var(--teal);
  color: white;
  text-align: center;
}

.button.secondary {
  background: transparent;
  color: var(--teal);
}

section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 46px 24px;
}

.section-lead {
  color: var(--muted);
  font-size: 18px;
  max-width: 860px;
  margin: 0 0 30px;
}

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

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

.grid.four {
  grid-template-columns: repeat(4,minmax(0,1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
  min-width: 0;
}

.card p {
  color: var(--muted);
  margin: 0;
}

.tag {
  display: inline-flex;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--teal-dark);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  margin-bottom: 14px;
}

.panel {
  background: var(--teal);
  color: white;
  border-radius: 30px;
  padding: 36px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 30px;
  align-items: start;
  min-width: 0;
}

.panel > *,
.hero-grid > *,
.grid > * {
  min-width: 0;
}

.panel h2,
.panel p {
  color: white;
}

.panel .section-lead {
  opacity: .88;
}

.matrix {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.matrix-row {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 18px;
  padding: 14px 16px;
  min-width: 0;
}

.matrix-row strong {
  display: block;
  margin-bottom: 4px;
}

.visual-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 14px;
  box-shadow: var(--shadow);
  min-width: 0;
  overflow: hidden;
}

.visual-card img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 18px;
}

.hero-visual img {
  min-height: 520px;
  max-height: 690px;
}

.visual-wide {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
}

.visual-wide img {
  width: 100%;
  max-height: 760px;
  object-fit: contain;
}

.visual-card figcaption {
  padding: 12px 4px 2px;
  color: var(--muted);
  font-size: 14px;
}

.formula-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 32px;
  box-shadow: var(--shadow);
  min-width: 0;
}

.formula-visual {
  margin: 24px 0;
  padding: 28px;
  border-radius: 22px;
  background: var(--soft);
  border: 1px solid var(--line);
  text-align: center;
}

.formula-main {
  font-size: clamp(24px,4vw,44px);
  font-weight: 800;
  letter-spacing: -.04em;
  color: var(--ink);
  line-height: 1.2;
}

.formula-main strong {
  color: var(--teal);
}

.formula-caption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 15px;
}

.formula-key {
  display: grid;
  grid-template-columns: repeat(5,minmax(0,1fr));
  gap: 10px;
}

.formula-key span {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
  color: var(--teal-dark);
  font-weight: 700;
  font-size: 14px;
  text-align: center;
  min-width: 0;
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
}

.result-table th,
.result-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.result-table th {
  background: var(--soft);
  color: var(--ink);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.result-table tr:last-child td {
  border-bottom: 0;
}

.metric {
  font-weight: 800;
  color: var(--teal-dark);
}

.note {
  background: var(--amber-soft);
  border: 1px solid #efd7a8;
  border-radius: 24px;
  padding: 24px;
  color: #4c3920;
}

.note strong {
  color: #3c2a11;
}

.paper-status {
  display: inline-flex;
  width: fit-content;
  font-size: 12px;
  font-weight: 800;
  background: var(--soft);
  color: var(--teal-dark);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  margin-bottom: 14px;
}

.paper-meta {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.method {
  border-left: 4px solid var(--teal);
  padding-left: 22px;
  max-width: 860px;
}

.usecase-row {
  display: grid;
  grid-template-columns: 190px 1fr 1fr;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.usecase-row > * {
  min-width: 0;
}

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

.usecase-row strong {
  color: var(--ink);
}

.architecture {
  display: grid;
  grid-template-columns: repeat(5,minmax(0,1fr));
  gap: 12px;
}

.architecture .card {
  min-height: 180px;
}

.step {
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  margin-bottom: 18px;
}

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 36px 24px 56px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

h1,
h2,
h3,
.lead,
.section-lead,
.card,
.matrix-row,
.method,
.visual-card figcaption,
.result-table th,
.result-table td {
  overflow-wrap: break-word;
}

@media (max-width: 980px) {
  .nav {
    gap: 16px;
  }

  .links {
    gap: 10px 12px;
  }

  .hero-grid,
  .panel {
    grid-template-columns: 1fr;
  }

  .grid,
  .grid.two,
  .grid.four,
  .architecture {
    grid-template-columns: repeat(2,minmax(0,1fr));
  }

  .formula-key {
    grid-template-columns: repeat(2,minmax(0,1fr));
  }

  .hero-visual img {
    min-height: auto;
    max-height: none;
  }

  .usecase-row {
    grid-template-columns: 150px 1fr 1fr;
  }

  .result-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 128px;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-bottom: 10px;
  }

  .links {
    width: 100%;
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 6px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .links::-webkit-scrollbar {
    display: none;
  }

  .links a {
    white-space: nowrap;
    flex: 0 0 auto;
  }

  .grid,
  .grid.two,
  .grid.four,
  .architecture,
  .formula-key,
  .usecase-row {
    grid-template-columns: 1fr;
  }

  .architecture .card {
    min-height: auto;
  }

  .button-row {
    align-items: stretch;
  }
}

@media (max-width: 620px) {
  .nav {
    padding: 12px 18px 10px;
  }

  .links {
    width: calc(100% + 36px);
    margin-left: -18px;
    margin-right: -18px;
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    padding: 48px 18px 28px;
  }

  section {
    padding: 34px 18px;
  }

  footer {
    padding: 30px 18px 44px;
  }

  h1 {
    font-size: clamp(34px,11vw,46px);
    line-height: 1.02;
  }

  h2 {
    font-size: clamp(28px,8vw,36px);
    line-height: 1.05;
  }

  .lead {
    font-size: 18px;
    margin-bottom: 22px;
  }

  .section-lead {
    font-size: 17px;
    margin-bottom: 24px;
  }

  .button-row {
    gap: 10px;
    margin-top: 22px;
  }

  .button {
    width: 100%;
    min-height: 46px;
  }

  .card {
    padding: 20px;
    border-radius: 20px;
  }

  .panel {
    padding: 22px;
    border-radius: 22px;
    gap: 22px;
  }

  .matrix-row {
    padding: 13px 14px;
    border-radius: 15px;
  }

  .visual-card {
    padding: 10px;
    border-radius: 20px;
  }

  .visual-card img {
    border-radius: 14px;
  }

  .visual-card figcaption {
    padding: 10px 4px 2px;
  }

  .formula-panel {
    padding: 20px;
    border-radius: 22px;
  }

  .formula-visual {
    margin: 18px 0;
    padding: 20px 14px;
    border-radius: 18px;
  }

  .formula-main {
    font-size: clamp(22px,7.5vw,30px);
  }

  .formula-key {
    gap: 8px;
  }

  .note {
    padding: 20px;
    border-radius: 20px;
  }

  .method {
    padding-left: 16px;
  }

  .result-table th,
  .result-table td {
    padding: 12px;
    min-width: 150px;
  }

  .usecase-row {
    gap: 10px;
    padding: 16px 0;
  }
}

@media (max-width: 420px) {
  .nav,
  .hero,
  section,
  footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .links {
    width: calc(100% + 32px);
    margin-left: -16px;
    margin-right: -16px;
    padding-left: 16px;
    padding-right: 16px;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 28px;
  }

  .panel,
  .formula-panel {
    padding: 18px;
  }

  .card {
    padding: 18px;
  }
}