:root {
  color-scheme: dark;
  --ink: #f3fbff;
  --muted: #a9c2c9;
  --soft: #6f8992;
  --bg: #05080a;
  --panel: #0b1718;
  --panel-2: #10201c;
  --line: rgba(143, 227, 221, 0.22);
  --cyan: #00e5ff;
  --green: #43ffb3;
  --amber: #ffb84d;
  --coral: #ff5c7a;
  --white: #ffffff;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 78px;
  padding: 14px clamp(18px, 4vw, 54px);
  background: linear-gradient(180deg, rgba(5, 8, 10, 0.88), rgba(5, 8, 10, 0.42));
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.brand img {
  width: 218px;
  height: auto;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 26px;
  color: #d7eef2;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  opacity: 0.82;
  transition:
    opacity 180ms ease,
    color 180ms ease;
}

.nav-links a:hover {
  color: var(--green);
  opacity: 1;
}

.nav-cta,
.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 0 18px;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
}

.language-switch button {
  min-width: 46px;
  height: 34px;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 900;
}

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

.language-switch button[aria-pressed="true"] {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.95), rgba(67, 255, 179, 0.95));
  color: #03100d;
}

.nav-cta {
  color: var(--green);
  background: rgba(67, 255, 179, 0.08);
}

.hero {
  position: relative;
  min-height: 760px;
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: 120px clamp(20px, 5vw, 72px) 70px;
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(5, 8, 10, 0.96) 0%, rgba(5, 8, 10, 0.8) 31%, rgba(5, 8, 10, 0.18) 72%),
    linear-gradient(0deg, rgba(5, 8, 10, 1) 0%, rgba(5, 8, 10, 0) 34%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 96px);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 710px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 26px;
  padding-bottom: 8px;
  font-size: clamp(54px, 7vw, 90px);
  line-height: 1.1;
  font-weight: 900;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(36px, 4.6vw, 58px);
  line-height: 1.16;
  font-weight: 900;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
  line-height: 1.2;
}

.hero-copy {
  max-width: 650px;
  color: var(--muted);
  font-size: 22px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 36px 0 42px;
}

.button.primary {
  border-color: rgba(67, 255, 179, 0.7);
  background: linear-gradient(135deg, var(--cyan), var(--green));
  color: #03100d;
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.06);
}

.hero-proof {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 650px;
  border: 1px solid var(--line);
  background: var(--line);
}

.hero-proof div {
  min-height: 94px;
  padding: 18px;
  background: rgba(5, 8, 10, 0.76);
}

.hero-proof dt {
  margin-bottom: 10px;
  color: var(--white);
  font-size: 18px;
  font-weight: 900;
}

.hero-proof dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 110px clamp(20px, 5vw, 72px);
}

.section-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.statement {
  background: #f7fbfb;
  color: #06100f;
}

.statement .eyebrow {
  color: #087d70;
}

.statement-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 70px;
  align-items: end;
}

.statement-grid p:last-child {
  margin-bottom: 0;
  color: #274442;
  font-size: 24px;
  line-height: 1.65;
}

.section-heading {
  max-width: 850px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-heading.align-left {
  margin: 0;
  text-align: left;
}

.section-heading p {
  color: var(--muted);
  font-size: 20px;
  line-height: 1.7;
}

.loop-section {
  background:
    linear-gradient(180deg, #05080a, #071010),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 80px);
}

.loop-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: step;
}

.loop-track li {
  min-height: 150px;
  padding: 20px;
  background: linear-gradient(180deg, rgba(15, 36, 30, 0.92), rgba(8, 18, 18, 0.92));
  border: 1px solid var(--line);
  position: relative;
}

.loop-track li::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  margin-bottom: 26px;
  color: var(--amber);
  font-size: 13px;
  font-weight: 900;
}

.loop-track strong {
  display: block;
  margin-bottom: 10px;
  font-size: 19px;
}

.loop-track span {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

.platform {
  background: #0a0d0c;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 58px;
  align-items: center;
}

.architecture {
  display: grid;
  gap: 14px;
}

.architecture div,
.application-grid article,
.moat-list p {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.architecture div {
  padding: 22px 24px;
}

.architecture span {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  font-weight: 900;
}

.architecture p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.data-engine {
  background:
    radial-gradient(circle at 12% 20%, rgba(0, 229, 255, 0.16), transparent 30%),
    radial-gradient(circle at 88% 70%, rgba(67, 255, 179, 0.12), transparent 28%),
    #05080a;
}

.data-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 54px;
  align-items: center;
}

.data-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.data-cards article {
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(12, 32, 28, 0.9), rgba(9, 15, 15, 0.88));
}

.data-cards span {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  border: 1px solid rgba(67, 255, 179, 0.42);
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.data-cards p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.execution {
  background: #f3f7f5;
  color: #08110f;
}

.execution .eyebrow {
  color: #0a7d68;
}

.execution .section-heading p {
  color: #405551;
}

.visual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 24px;
}

figure {
  margin: 0;
  background: #0b1112;
  border: 1px solid rgba(0, 0, 0, 0.12);
}

figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

figcaption {
  padding: 16px 18px;
  color: #d8f3f0;
  font-size: 15px;
  font-weight: 800;
}

.applications {
  background: #090a0a;
}

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

.application-grid article {
  min-height: 168px;
  padding: 24px;
}

.application-grid h3 {
  color: var(--white);
}

.application-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.moat {
  background: linear-gradient(135deg, #10160f 0%, #05080a 55%, #150b10 100%);
}

.moat-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 54px;
}

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

.moat-list p {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 24px;
  margin: 0;
  padding: 20px;
}

.moat-list strong {
  color: var(--green);
}

.moat-list span {
  color: var(--muted);
}

.contact {
  background: #f7fbfb;
  color: #06100f;
}

.contact-panel {
  text-align: center;
}

.contact-panel .eyebrow {
  color: #0a7d68;
}

.contact-panel p {
  max-width: 720px;
  margin: 0 auto 32px;
  color: #405551;
  font-size: 22px;
  line-height: 1.7;
}

.site-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 28px clamp(20px, 5vw, 72px);
  background: #05080a;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--soft);
  font-size: 14px;
}

.site-footer img {
  width: 190px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: auto auto;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: 720px;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(5, 8, 10, 0.94), rgba(5, 8, 10, 0.56)),
      linear-gradient(0deg, rgba(5, 8, 10, 1), rgba(5, 8, 10, 0.1));
  }

  .statement-grid,
  .split,
  .visual-grid,
  .data-grid,
  .moat-grid {
    grid-template-columns: 1fr;
  }

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

  .site-footer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: 70px;
    padding: 12px 16px;
  }

  .brand img {
    width: 156px;
  }

  .nav-cta {
    min-height: 38px;
    padding: 0 12px;
    font-size: 12px;
  }

  .header-actions {
    gap: 8px;
  }

  .language-switch button {
    min-width: 38px;
    height: 32px;
    font-size: 11px;
  }

  .hero {
    min-height: 760px;
    padding: 104px 18px 54px;
  }

  h1 {
    font-size: 48px;
  }

  h2 {
    font-size: 34px;
  }

  .hero-copy,
  .section-heading p,
  .statement-grid p:last-child,
  .contact-panel p {
    font-size: 18px;
  }

  .hero-proof,
  .loop-track,
  .data-cards,
  .application-grid {
    grid-template-columns: 1fr;
  }

  .moat-list p {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .section {
    padding: 76px 18px;
  }
}

.founder-card {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px;
  border: 1px solid rgba(6, 16, 15, 0.12);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 24px 70px rgba(8, 32, 29, 0.1);
}

.contact-panel .founder-name {
  margin-bottom: 4px;
  color: #06100f;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.contact-panel .founder-title {
  margin-bottom: 22px;
  color: #0a7d68;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.button.secondary.light {
  color: #06100f;
  border-color: rgba(6, 16, 15, 0.22);
  background: rgba(6, 16, 15, 0.04);
}

.contact-panel .contact-meta {
  margin-bottom: 0;
  color: #405551;
  font-size: 16px;
}

.contact-meta a {
  color: #0a7d68;
  font-weight: 800;
}

.wechat-contact {
  max-width: 320px;
  margin: 18px auto 0;
  text-align: center;
}

.wechat-contact summary {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 1px solid rgba(6, 16, 15, 0.18);
  background: rgba(6, 16, 15, 0.035);
  color: #06100f;
  cursor: pointer;
  font-size: 14px;
  font-weight: 850;
  list-style: none;
}

.wechat-contact summary::-webkit-details-marker {
  display: none;
}

.wechat-qr-wrap {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid rgba(6, 16, 15, 0.12);
  background: #fff;
}

.wechat-qr-wrap img {
  display: block;
  width: min(220px, 100%);
  height: auto;
  margin: 0 auto;
}

.contact-panel .wechat-qr-wrap p {
  margin: 10px auto 0;
  color: #405551;
  font-size: 13px;
  line-height: 1.5;
}

.company-contact {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}