:root {
  --ink: #101318;
  --charcoal: #202631;
  --muted: #68717c;
  --soft: #8b949f;
  --line: #dfe3e6;
  --paper: #fbfbfa;
  --wash: #f1f4f3;
  --white: #ffffff;
  --blue: #315eff;
  --aqua: #7cd3c6;
  --lime: #cde66b;
  --gold: #b9965f;
  --shadow: 0 24px 70px rgba(16, 19, 24, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0;
}

body.nav-open {
  overflow: hidden;
}

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

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 14px;
  left: 14px;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-140%);
}

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

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  right: 0;
  height: 88px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(18px, 2.4vw, 36px);
  padding: 0 clamp(22px, 5vw, 72px);
  border-bottom: 1px solid rgba(16, 19, 24, 0.08);
  background: rgba(255, 255, 255, 0.76);
  backdrop-filter: blur(18px);
  transition: height 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  height: 72px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 14px 38px rgba(16, 19, 24, 0.08);
}

.brand-lockup,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.dicui-mark {
  width: clamp(156px, 13vw, 210px);
  display: inline-flex;
  align-items: center;
}

.dicui-mark img {
  width: 100%;
  height: auto;
  max-height: 30px;
  object-fit: contain;
}

.brand-divider {
  width: 1px;
  height: 26px;
  background: #c8ced4;
}

.nlu-lock {
  display: inline-grid;
  gap: 3px;
}

.nlu-logo {
  font-size: 32px;
  line-height: 1;
  font-weight: 560;
  letter-spacing: 0;
}

.brand-sub {
  color: var(--muted);
  font-size: 10px;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(12px, 1.25vw, 22px);
  color: #38404a;
  font-size: 13px;
}

.site-nav a {
  position: relative;
  padding: 12px 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 5px;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.header-action,
.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  padding: 0 24px;
  font-size: 14px;
  white-space: nowrap;
}

.header-action,
.button-dark {
  background: var(--ink);
  color: var(--white);
}

.button-light {
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--white);
}

.nav-toggle span {
  width: 19px;
  height: 1px;
  display: block;
  background: var(--ink);
  transition: transform 160ms ease;
}

.nav-toggle span + span {
  margin-top: -13px;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: min(820px, calc(100svh - 64px));
  padding: 158px clamp(22px, 5vw, 72px) 70px;
  display: grid;
  align-items: end;
  isolation: isolate;
  overflow: hidden;
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media {
  background-image: url("../images/hero-combo.jpg");
  background-size: cover;
  background-position: 68% 44%;
  transform: scale(1.01);
}

.hero-overlay {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(251, 251, 250, 0.96) 0%, rgba(251, 251, 250, 0.82) 36%, rgba(251, 251, 250, 0.3) 72%, rgba(251, 251, 250, 0.1) 100%),
    linear-gradient(180deg, rgba(251, 251, 250, 0.18) 0%, rgba(251, 251, 250, 0.74) 100%);
}

.hero-content {
  width: min(680px, 100%);
}

.eyebrow,
.section-kicker,
.product-time {
  margin: 0;
  color: var(--blue);
  font-size: 13px;
  line-height: 1.35;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #56606a;
}

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

h1 {
  margin-bottom: 30px;
  font-size: clamp(54px, 7vw, 96px);
  line-height: 0.98;
  font-weight: 560;
}

.hero-lead {
  width: min(600px, 100%);
  margin-bottom: 40px;
  color: #3d444d;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-proof {
  position: absolute;
  right: clamp(22px, 5vw, 72px);
  bottom: 66px;
  width: min(520px, calc(100% - 44px));
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(16, 19, 24, 0.22);
  border-bottom: 1px solid rgba(16, 19, 24, 0.22);
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(14px);
  box-shadow: 0 22px 60px rgba(16, 19, 24, 0.08);
}

.hero-proof div {
  min-height: 130px;
  padding: 22px;
  border-right: 1px solid rgba(16, 19, 24, 0.12);
}

.hero-proof div:last-child {
  border-right: 0;
}

.hero-proof strong {
  display: block;
  margin-bottom: 10px;
  font-size: 34px;
  line-height: 1;
  font-weight: 560;
}

.hero-proof span {
  color: #59626d;
  font-size: 13px;
  line-height: 1.55;
}

.intro-band {
  min-height: 92px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.intro-band p {
  margin: 0;
  padding: 28px clamp(18px, 4vw, 72px);
  color: #4f5762;
  font-size: 15px;
  border-right: 1px solid var(--line);
}

.intro-band p:last-child {
  color: var(--ink);
  font-weight: 560;
  border-right: 0;
}

.visual-statement {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
  min-height: 620px;
  background: #f5f2eb;
}

.visual-frame {
  min-height: 620px;
  overflow: hidden;
}

.visual-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 54% center;
}

.visual-copy {
  padding: clamp(42px, 5vw, 74px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 1px solid rgba(16, 19, 24, 0.08);
}

.visual-copy h2 {
  margin: 18px 0 24px;
  font-size: clamp(38px, 4.6vw, 64px);
  line-height: 1.06;
}

.visual-copy p:not(.section-kicker) {
  margin-bottom: 0;
  color: #555148;
  font-size: 18px;
  line-height: 1.86;
}

.section {
  padding: clamp(76px, 8vw, 116px) clamp(22px, 5vw, 72px);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(180px, 360px) minmax(0, 1fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: start;
  margin-bottom: clamp(42px, 5vw, 64px);
}

h2 {
  margin-bottom: 22px;
  font-size: clamp(36px, 4.3vw, 58px);
  line-height: 1.12;
  font-weight: 540;
}

.section-desc {
  max-width: 880px;
  margin-bottom: 0;
  color: #4d545e;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.82;
}

.brand-section {
  background: var(--white);
}

.brand-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 28px;
}

.brand-story {
  min-height: 420px;
  padding: clamp(32px, 4vw, 54px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    linear-gradient(180deg, rgba(16, 19, 24, 0.12), rgba(16, 19, 24, 0.86)),
    url("../images/editorial-duo-scene.jpg");
  background-size: cover;
  background-position: center;
  color: var(--white);
}

.story-label {
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
  text-transform: uppercase;
}

.brand-story h3 {
  max-width: 660px;
  margin-bottom: 30px;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.14;
  font-weight: 520;
}

.brand-story p:last-child {
  max-width: 710px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
  line-height: 1.8;
}

.brand-values {
  min-height: 420px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.brand-values span {
  min-height: 140px;
  display: flex;
  align-items: center;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: #38404a;
  font-size: 20px;
  background: #fbfbfa;
}

.technology-section {
  background: #eef3f1;
}

.tech-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(330px, 0.9fr);
  gap: 34px;
}

.tech-visual {
  position: relative;
  min-height: 560px;
  padding: clamp(32px, 4vw, 52px);
  overflow: hidden;
  background: var(--charcoal);
  color: var(--white);
}

.tech-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(16, 19, 24, 0.28), rgba(16, 19, 24, 0.76));
}

.tech-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tech-visual h3 {
  position: relative;
  z-index: 2;
  max-width: 560px;
  margin-bottom: 0;
  font-size: clamp(36px, 4vw, 54px);
  line-height: 1.14;
  font-weight: 530;
}

.tech-visual p {
  position: absolute;
  z-index: 2;
  left: clamp(32px, 4vw, 52px);
  right: clamp(32px, 4vw, 52px);
  bottom: clamp(32px, 4vw, 52px);
  max-width: 620px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
  line-height: 1.78;
}

.tech-rings {
  position: absolute;
  z-index: 2;
  right: 58px;
  top: 92px;
  width: 300px;
  height: 300px;
}

.tech-rings span {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(124, 211, 198, 0.56);
}

.tech-rings span:nth-child(1) {
  inset: 0;
}

.tech-rings span:nth-child(2) {
  inset: 48px;
  border-color: rgba(205, 230, 107, 0.58);
}

.tech-rings span:nth-child(3) {
  inset: 104px;
  background: rgba(124, 211, 198, 0.12);
}

.tech-steps {
  display: grid;
  gap: 18px;
}

.tech-steps article,
.evidence-item,
.faq-list details {
  border: 1px solid var(--line);
  background: var(--white);
}

.tech-steps article {
  min-height: 126px;
  padding: 28px;
}

.tech-steps span {
  display: block;
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 650;
}

.tech-steps h3 {
  margin-bottom: 10px;
  font-size: 19px;
  font-weight: 560;
}

.tech-steps p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.products-section {
  background: var(--wash);
}

.product-switch {
  width: fit-content;
  display: flex;
  gap: 0;
  margin-bottom: 22px;
  border: 1px solid #cfd5da;
  background: var(--white);
}

.product-switch button {
  min-width: 132px;
  height: 46px;
  border: 0;
  border-right: 1px solid #cfd5da;
  background: transparent;
  color: #4d5661;
  cursor: pointer;
}

.product-switch button:last-child {
  border-right: 0;
}

.product-switch button.is-active {
  background: var(--ink);
  color: var(--white);
}

.product-feature {
  display: none;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, 0.98fr);
  gap: 0;
  min-height: 620px;
  border: 0;
  background: var(--white);
  box-shadow: var(--shadow);
}

.product-feature.is-active {
  display: grid;
}

.product-image {
  min-height: 620px;
  background: #f8f9f8;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-copy {
  padding: clamp(34px, 5vw, 68px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.product-copy h3 {
  margin: 18px 0 20px;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.18;
  font-weight: 530;
}

.product-copy p:not(.product-time) {
  margin-bottom: 32px;
  color: #4e5660;
  font-size: 18px;
  line-height: 1.78;
}

.product-data {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 28px;
}

.product-data div {
  min-height: 112px;
  padding: 18px;
  border-top: 1px solid var(--ink);
  background: #fbfbfa;
}

.product-data dt {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
}

.product-data dd {
  margin: 0;
  font-size: 28px;
  font-weight: 560;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tags span {
  padding: 9px 13px;
  border: 1px solid #d6dce1;
  background: var(--white);
  color: #4d5660;
  font-size: 13px;
}

.product-actions {
  margin-top: 26px;
}

.dual-products {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.dual-products article {
  min-height: 260px;
  display: grid;
  grid-template-columns: 220px 1fr;
  align-items: center;
  gap: 28px;
  padding: 24px;
  border: 1px solid #d9dde1;
  background: var(--white);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.dual-products article:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 44px rgba(16, 19, 24, 0.08);
}

.dual-products img {
  width: 180px;
  height: 220px;
  object-fit: contain;
  margin: 0 auto;
}

.dual-products p {
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 13px;
  text-transform: uppercase;
}

.dual-products h3 {
  margin-bottom: 14px;
  font-size: 30px;
  font-weight: 540;
}

.dual-products span {
  color: var(--muted);
  font-size: 16px;
}

.evidence-section {
  background: var(--white);
}

.evidence-head {
  align-items: stretch;
}

.evidence-head-visual {
  min-height: 300px;
  padding: clamp(24px, 3vw, 34px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(16, 19, 24, 0.12);
  background:
    linear-gradient(180deg, rgba(16, 19, 24, 0.04), rgba(16, 19, 24, 0.78)),
    linear-gradient(90deg, rgba(49, 94, 255, 0.22), rgba(185, 150, 95, 0.16)),
    url("../images/evidence-patent-bg.jpg");
  background-size: cover;
  background-position: 50% 26%;
  color: var(--white);
}

.evidence-head-visual::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  pointer-events: none;
}

.evidence-head-visual p {
  position: relative;
  margin-bottom: 18px;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1;
  font-weight: 540;
}

.evidence-head-visual span {
  position: relative;
  width: fit-content;
  margin-top: 8px;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  line-height: 1;
  text-transform: uppercase;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 28px;
}

.evidence-item {
  min-height: 220px;
  padding: 30px;
  border-top: 1px solid var(--ink);
  background: linear-gradient(180deg, #ffffff 0%, #f8faf9 100%);
}

.evidence-item strong {
  display: block;
  margin-bottom: 18px;
  font-size: clamp(36px, 4vw, 50px);
  line-height: 1;
  font-weight: 540;
}

.evidence-item p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

.evidence-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  gap: 28px;
  align-items: stretch;
}

.chart-panel,
.patent-panel,
.raman-panel {
  padding: clamp(28px, 4vw, 44px);
  background: #fbfbfa;
  border: 1px solid var(--line);
}

.chart-panel,
.raman-panel {
  display: grid;
  gap: 24px;
}

.panel-label {
  margin-bottom: 8px;
  color: var(--gold);
  font-size: 13px;
  line-height: 1.3;
  text-transform: uppercase;
}

.chart-row {
  display: grid;
  grid-template-columns: 120px 1fr 82px;
  gap: 18px;
  align-items: center;
}

.chart-row span {
  color: #4a535e;
  font-size: 15px;
}

.chart-row div {
  height: 8px;
  background: #e1e6e8;
}

.chart-row i {
  display: block;
  height: 100%;
  background: var(--ink);
}

.chart-row b {
  text-align: right;
  font-size: 17px;
}

.patent-panel {
  display: grid;
  gap: 22px;
}

.patent-panel img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 0;
}

.patent-panel p,
.raman-panel p,
.note {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.72;
}

.raman-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.raman-row span {
  color: #4a535e;
  font-size: 15px;
}

.raman-row b {
  font-size: 25px;
  line-height: 1;
  font-weight: 560;
}

.raman-row em {
  color: var(--gold);
  font-size: 15px;
  font-style: normal;
}

.note {
  margin-top: 24px;
}

.whitepaper-section {
  background: #f3f0e9;
}

.whitepaper-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  gap: 28px;
  align-items: stretch;
}

.whitepaper-lead {
  min-height: 520px;
  padding: clamp(34px, 5vw, 58px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    linear-gradient(180deg, rgba(16, 19, 24, 0.1), rgba(16, 19, 24, 0.86)),
    url("../images/evidence-patent-bg.jpg");
  background-size: cover;
  background-position: center;
  color: var(--white);
}

.whitepaper-lead .panel-label {
  color: rgba(255, 255, 255, 0.72);
}

.whitepaper-lead h3 {
  margin: 14px 0 24px;
  font-size: clamp(34px, 4.2vw, 54px);
  line-height: 1.13;
  font-weight: 540;
}

.whitepaper-lead p:not(.panel-label) {
  max-width: 680px;
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
  line-height: 1.82;
}

.whitepaper-lead .button {
  width: fit-content;
  border-color: var(--white);
  background: var(--white);
  color: var(--ink);
}

.whitepaper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.whitepaper-actions .button-light {
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.58);
}

.whitepaper-actions .button-light:hover {
  background: rgba(255, 255, 255, 0.16);
}

.whitepaper-lead .whitepaper-stable-links {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
  line-height: 1.6;
}

.whitepaper-lead .whitepaper-stable-links a {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.whitepaper-points article {
  min-height: 248px;
  padding: 28px;
  border: 1px solid rgba(16, 19, 24, 0.1);
  background: rgba(255, 255, 255, 0.86);
}

.whitepaper-points span {
  display: block;
  margin-bottom: 22px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 650;
}

.whitepaper-points h3 {
  margin-bottom: 14px;
  font-size: 23px;
  font-weight: 560;
}

.whitepaper-points p {
  margin-bottom: 0;
  color: #5b626b;
  font-size: 15px;
  line-height: 1.78;
}

.ritual-section {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  min-height: 560px;
  background: #11151a;
  color: var(--white);
}

.ritual-copy {
  padding: clamp(48px, 5vw, 72px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.ritual-copy h2 {
  margin-top: 18px;
  font-size: clamp(46px, 6vw, 78px);
  line-height: 1.05;
}

.ritual-copy p:not(.section-kicker) {
  max-width: 600px;
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 19px;
  line-height: 1.8;
}

.ritual-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.ritual-list span {
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
}

.ritual-image {
  min-height: 560px;
  background-image: url("../images/ritual-combo.jpg");
  background-size: cover;
  background-position: center 42%;
}

.scenes-section {
  background: #f7f4ee;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.scene-grid figure {
  margin: 0;
  background: var(--white);
  border: 0;
  box-shadow: 0 18px 50px rgba(16, 19, 24, 0.08);
}

.scene-grid img {
  width: 100%;
  height: 560px;
  object-fit: cover;
}

.scene-grid figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 26px;
  color: #38404a;
  font-size: 17px;
}

.scene-grid figcaption span {
  color: var(--gold);
  font-size: 12px;
  text-transform: uppercase;
}

.faq-section {
  background: var(--white);
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-list details {
  padding: 0 28px;
}

.faq-list summary {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  color: var(--ink);
  font-size: 19px;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  color: var(--blue);
  font-size: 24px;
}

.faq-list details[open] summary::after {
  content: "-";
}

.faq-list p {
  max-width: 860px;
  margin: -6px 0 26px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.78;
}

.contact-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  padding: clamp(58px, 7vw, 88px) clamp(22px, 5vw, 72px);
  border-top: 1px solid var(--line);
  background: #f2f5f4;
}

.contact-section h2 {
  margin: 12px 0 18px;
}

.contact-section p:not(.section-kicker) {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.contact-actions {
  display: grid;
  gap: 14px;
  justify-items: end;
}

.contact-actions span {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 24px;
  padding: 38px clamp(22px, 5vw, 72px);
  border-top: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin-bottom: 0;
}

.footer-beian {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 10px 18px;
}

.footer-beian a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
}

.police-beian img {
  width: 18px;
  height: 20px;
  object-fit: contain;
}

@media (max-width: 1180px) {
  .site-header {
    grid-template-columns: auto auto auto;
    gap: 22px;
  }

  .brand-sub {
    display: none;
  }

  .site-nav {
    gap: 18px;
  }

  .hero-proof {
    position: static;
    margin-top: 46px;
  }

  .hero {
    align-items: center;
    padding-bottom: 44px;
  }
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
    height: 74px;
  }

  .header-action {
    display: none;
  }

  .nav-toggle {
    display: grid;
  }

  .site-nav {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    align-content: start;
    justify-content: start;
    gap: 0;
    padding: 24px 22px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(18px);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    width: 100%;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
    font-size: 18px;
  }

  .site-nav a::after {
    display: none;
  }

  .dicui-mark {
    width: 132px;
  }

  .nlu-logo {
    font-size: 27px;
  }

  .hero {
    min-height: auto;
    padding-top: 130px;
  }

  .hero-proof,
  .intro-band,
  .visual-statement,
  .section-head,
  .brand-grid,
  .tech-layout,
  .product-feature,
  .dual-products,
  .evidence-grid,
  .evidence-detail,
  .whitepaper-layout,
  .whitepaper-points,
  .ritual-section,
  .scene-grid,
  .contact-section,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero-proof {
    width: 100%;
  }

  .intro-band p {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .visual-frame {
    min-height: 480px;
  }

  .visual-copy {
    border-left: 0;
    border-top: 1px solid rgba(16, 19, 24, 0.08);
  }

  .brand-values {
    grid-template-columns: 1fr;
  }

  .evidence-head-visual {
    min-height: 240px;
  }

  .tech-visual,
  .product-image,
  .ritual-image {
    min-height: 430px;
  }

  .product-feature {
    min-height: 0;
  }

  .dual-products article {
    grid-template-columns: 160px 1fr;
  }

  .dual-products img {
    width: 130px;
    height: 170px;
  }

  .contact-section {
    align-items: start;
  }

  .contact-actions {
    justify-items: start;
  }

  .footer-beian {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .brand-lockup {
    gap: 10px;
  }

  .brand-divider {
    height: 17px;
  }

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

  .hero-proof div {
    min-height: 94px;
    border-right: 0;
    border-bottom: 1px solid rgba(16, 19, 24, 0.12);
  }

  .hero-proof div:last-child {
    border-bottom: 0;
  }

  .button {
    width: 100%;
  }

  .product-switch {
    width: 100%;
  }

  .product-switch button {
    flex: 1;
    min-width: 0;
  }

  .product-data {
    grid-template-columns: 1fr;
  }

  .dual-products article {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .chart-row {
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .chart-row b {
    text-align: left;
  }

  .scene-grid img {
    height: 360px;
  }

  .visual-frame {
    min-height: 380px;
  }
}