:root {
  --bg-deep: #060a0f;
  --bg-card: rgba(15, 22, 32, 0.72);
  --border: rgba(74, 158, 219, 0.22);
  --blue: #4a9edb;
  --blue-dim: #3a7eb0;
  --gold: #d4af37;
  --text: #e8eef4;
  --muted: #b0bec5;
  --font-sans: "Noto Sans SC", "DM Sans", system-ui, sans-serif;
  --font-en: "DM Sans", "Noto Sans SC", sans-serif;
  --radius: 12px;
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  color: #6eb8ea;
}

.container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: linear-gradient(180deg, rgba(6, 10, 15, 0.96) 0%, rgba(6, 10, 15, 0.85) 70%, transparent 100%);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.header-inner {
  width: min(1200px, 100% - 2rem);
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1.15;
  color: inherit;
}

.logo:hover {
  color: inherit;
}

.logo-cn {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
}

.logo-en {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem 1.25rem;
}

.nav a {
  font-size: 0.875rem;
  color: var(--muted);
  padding: 0.35rem 0;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--gold);
}

@media (min-width: 901px) {
  .nav {
    margin-left: auto;
    margin-right: 0.75rem;
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.25);
}

.lang-btn {
  margin: 0;
  padding: 0.4rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.lang-btn:hover {
  color: var(--text);
}

.lang-btn.is-active {
  background: rgba(74, 158, 219, 0.25);
  color: var(--gold);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  cursor: pointer;
  position: relative;
}

.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--text);
  transition: transform 0.25s, opacity 0.25s;
}

.nav-toggle::before {
  top: 14px;
}

.nav-toggle::after {
  bottom: 14px;
}

.site-header.nav-open .nav-toggle::before {
  top: 21px;
  transform: rotate(45deg);
}

.site-header.nav-open .nav-toggle::after {
  bottom: 21px;
  transform: rotate(-45deg);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .header-actions {
    margin-left: auto;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 1.25rem;
    background: rgba(6, 10, 15, 0.98);
    border-bottom: 1px solid var(--border);
    gap: 0;
    display: none;
    margin-left: 0;
    margin-right: 0;
  }

  .site-header.nav-open .nav {
    display: flex;
  }

  .nav a {
    padding: 0.65rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 3rem) 1.5rem 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 55% at 70% 20%, rgba(74, 158, 219, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 15% 80%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, #0a1018 0%, var(--bg-deep) 100%);
  pointer-events: none;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  opacity: 1;
  mix-blend-mode: normal;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background-image:
    linear-gradient(rgba(74, 158, 219, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 158, 219, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
}

.hero-content {
  position: relative;
  width: min(800px, 100%);
  z-index: 3;
}

@media (prefers-reduced-motion: reduce) {
  .hero-canvas {
    opacity: 0.25;
  }
}

.hero-tag {
  font-size: 0.9rem;
  color: var(--gold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}

.hero h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-en);
  font-weight: 700;
  line-height: 1.05;
}

.hero-title-en {
  display: block;
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  color: var(--muted);
  letter-spacing: -0.02em;
}

.hero-title-sub {
  display: block;
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  font-weight: 600;
  color: #fff;
  margin-top: 0.35rem;
  letter-spacing: 0.04em;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 36em;
  margin: 0 0 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dim) 100%);
  color: #fff;
}

.btn-primary:hover {
  background: #5aabeb;
  color: #fff;
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
}

/* Sections */
.section {
  padding: 5rem 0;
  position: relative;
}

.section:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.section-head {
  margin-bottom: 3rem;
  text-align: center;
}

.section-kicker {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
}

.section-head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
}

.section-desc {
  margin: 0 auto;
  max-width: 36rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.accent-gold {
  color: var(--gold);
}

/* Cards */
.card {
  padding: 1.5rem 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.glass {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
}

.grid-2 {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.grid-3 {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.about-grid {
  margin-bottom: 2.5rem;
}

.about-grid h3,
.card h3 {
  margin-top: 0;
  color: var(--blue);
  font-size: 1.1rem;
}

.founders {
  display: grid;
  gap: 1.5rem;
}

.founders-single {
  max-width: 36rem;
  margin-inline: auto;
}

@media (min-width: 900px) {
  .founders:not(.founders-single) {
    grid-template-columns: 1fr 1fr;
  }
}

.founder-card h3 {
  margin: 0;
  font-size: 1.35rem;
  color: #fff;
}

.founder-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.role {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold);
}

.founder-bio {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.founder-bio li {
  margin-bottom: 0.5rem;
}

/* Pipeline */
.pipeline {
  display: grid;
  gap: 1rem;
}

@media (min-width: 900px) {
  .pipeline {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pipe-step {
  padding: 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(74, 158, 219, 0.06);
}

.pipe-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold);
  text-transform: uppercase;
}

.pipe-step h3 {
  margin: 0.4rem 0 0.75rem;
  font-family: var(--font-en);
  font-size: 1rem;
  color: #fff;
}

.pipe-step p {
  margin: 0 0 0.5rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.pipe-line .pipe-k,
.prod-line .prod-k {
  font-weight: 600;
  color: var(--text);
}

.subsection {
  margin-top: 3rem;
}

.subsection-title {
  font-size: 1.2rem;
  margin: 0 0 1.25rem;
  color: #fff;
}

.mini-card {
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.25);
}

.mini-card h4 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--blue);
}

.mini-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.narrow {
  max-width: 52rem;
  margin: 0 auto;
  color: var(--muted);
  text-align: center;
}

/* Products */
.product-cards {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 900px) {
  .product-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card {
  position: relative;
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(165deg, rgba(74, 158, 219, 0.1) 0%, rgba(6, 10, 15, 0.9) 100%);
}

.risk-tag {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.06em;
}

.risk-tag.low {
  background: rgba(46, 160, 67, 0.25);
  color: #7dffb2;
}

.risk-tag.mid {
  background: rgba(212, 175, 55, 0.2);
  color: var(--gold);
}

.risk-tag.high {
  background: rgba(248, 81, 73, 0.2);
  color: #ff9b8a;
}

.product-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1.35rem;
}

.product-en {
  font-family: var(--font-en);
  font-size: 0.85rem;
  color: var(--blue);
  margin: 0 0 1rem;
}

.product-card p {
  margin: 0 0 0.65rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.disclaimer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(176, 190, 197, 0.65);
  max-width: 40rem;
  margin-inline: auto;
}

.section-performance {
  padding-top: 0;
}

.performance-figure {
  margin: 0 auto 1rem;
  max-width: 960px;
  text-align: center;
}

.performance-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.35);
}

.performance-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.88rem;
  color: var(--muted);
}

body.is-english {
  font-family: var(--font-en), var(--font-sans);
}

body.is-english .logo-cn,
body.is-english .hero-title-en {
  font-family: var(--font-en), sans-serif;
}

/* Strategies */
.strategy-list {
  display: grid;
  gap: 1.25rem;
}

.strategy-item {
  padding: 1.5rem 1.75rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
}

.strategy-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
}

.strategy-toggle {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.12s;
}

.strategy-toggle:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.strategy-toggle:active {
  transform: translateY(1px);
}

.strategy-toggle::after {
  content: "▾";
  display: inline-block;
  transition: transform 0.18s ease;
  opacity: 0.85;
}

.strategy-item.is-open .strategy-toggle::after {
  transform: rotate(180deg);
}

.strategy-detail {
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.strategy-detail-grid {
  display: grid;
  gap: 1.25rem;
  align-items: start;
}

@media (min-width: 900px) {
  .strategy-detail-grid {
    grid-template-columns: 1.05fr 0.95fr;
  }
}

.strategy-detail-text p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.strategy-detail-text p:last-child {
  margin-bottom: 0;
}

.strategy-figure {
  margin: 0;
  text-align: center;
}

.strategy-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.35);
}

.strategy-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.strategy-item h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: #fff;
}

.strategy-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Risk */
.risk-grid {
  margin-bottom: 1.5rem;
}

.risk-committee {
  text-align: center;
}

.risk-committee h3 {
  color: var(--gold);
}

.risk-committee p {
  margin: 0;
  color: var(--muted);
  max-width: 48rem;
  margin-inline: auto;
}

/* Team */
.team-intro {
  text-align: center;
  color: var(--muted);
  max-width: 42rem;
  margin: 0 auto 1.5rem;
}

.team-highlights {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 36rem;
}

.team-highlights li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--muted);
}

.team-highlights li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}

/* Contact */
.section-contact {
  padding-bottom: 6rem;
}

.contact-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.contact-block {
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(74, 158, 219, 0.05);
}

.contact-label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.contact-value {
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  word-break: break-all;
}

.contact-value.text {
  display: block;
}

a.contact-value:hover {
  color: var(--gold);
}

/* Footer */
.site-footer {
  padding: 2.5rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: #040608;
}

.footer-inner {
  text-align: center;
}

.site-footer p {
  margin: 0 0 0.5rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.footer-note {
  font-size: 0.75rem;
  opacity: 0.75;
}