:root {
  --bg: #0a0e14;
  --bg-elevated: #111820;
  --bg-card: rgba(17, 24, 32, 0.72);
  --bg-card-hover: rgba(22, 30, 42, 0.88);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(201, 169, 98, 0.28);
  --text: #f4f6f8;
  --muted: #9aa8b8;
  --gold: #c9a962;
  --gold-light: #e2d4a8;
  --gold-dim: rgba(201, 169, 98, 0.14);
  --teal: #3daa9c;
  --teal-dim: rgba(61, 170, 156, 0.12);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --max-width: 1180px;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  padding: 10px 14px;
  background: #fff;
  color: #0a0e14;
  border-radius: 8px;
  z-index: 200;
}

.skip-link:focus {
  top: 16px;
}

.ambient {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
}

.ambient-orb--gold {
  width: 520px;
  height: 520px;
  top: -180px;
  right: -120px;
  background: rgba(201, 169, 98, 0.1);
}

.ambient-orb--teal {
  width: 420px;
  height: 420px;
  bottom: 10%;
  left: -140px;
  background: rgba(61, 170, 156, 0.08);
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: min(calc(100% - 32px), var(--max-width));
  margin: 16px auto 0;
  padding: 14px 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 14, 20, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(10, 14, 20, 0.92);
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-mark {
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  color: var(--gold);
  font-weight: 600;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.main-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.main-nav a {
  font-size: 0.92rem;
  color: var(--muted);
  transition: color 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--text);
}

.nav-cta {
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--gold-light) !important;
  background: var(--gold-dim);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--text);
  transition: transform 0.2s ease;
}

main {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 28px auto 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.85fr);
  gap: 28px;
  padding: 56px 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, rgba(201, 169, 98, 0.06), transparent 42%),
    linear-gradient(180deg, var(--bg-card), rgba(10, 14, 20, 0.5));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.02em;
}

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

.hero-lead {
  max-width: 52ch;
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn--primary {
  color: #0a0e14;
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  box-shadow: 0 8px 28px rgba(201, 169, 98, 0.22);
}

.btn--primary:hover {
  box-shadow: 0 12px 36px rgba(201, 169, 98, 0.32);
}

.btn--ghost {
  color: var(--text);
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
}

.hero-platforms {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.hero-platforms > span {
  display: block;
  margin-bottom: 12px;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.hero-platforms ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-platforms li {
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.86rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
}

.hero-flow {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: rgba(10, 14, 20, 0.55);
}

.flow-label {
  margin: 0 0 20px;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--teal);
  text-transform: uppercase;
}

.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.flow-steps li {
  display: grid;
  gap: 4px;
}

.flow-steps li:not(.flow-arrow) {
  padding: 16px 0;
}

.flow-num {
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.flow-steps strong {
  font-size: 1rem;
  font-weight: 600;
}

.flow-steps li > span:last-child {
  font-size: 0.88rem;
  color: var(--muted);
}

.flow-arrow {
  padding: 4px 0;
  color: var(--gold);
  font-size: 1.1rem;
  opacity: 0.6;
}

.section {
  margin-top: 24px;
  padding: 40px 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
}

.section--dark {
  background:
    linear-gradient(180deg, rgba(17, 24, 32, 0.95), rgba(10, 14, 20, 0.88));
}

.section--story {
  background:
    linear-gradient(160deg, rgba(61, 170, 156, 0.05), transparent 40%),
    var(--bg-card);
}

.section-header {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  margin-bottom: 32px;
}

.section-header--center {
  grid-template-columns: 1fr;
  text-align: center;
}

.section-header--center .section-index {
  margin-bottom: 8px;
}

.section-index {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.section-header h2 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.section-desc {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
}

.section-header--center .section-desc {
  margin-inline: auto;
}

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

.card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.card:hover {
  border-color: var(--line-strong);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.card--highlight {
  border-color: var(--line-strong);
  background: linear-gradient(160deg, var(--gold-dim), rgba(255, 255, 255, 0.02));
}

.card h3 {
  margin: 0 0 14px;
  font-size: 1.1rem;
  font-weight: 600;
}

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

.info-list {
  margin: 0;
}

.info-list div + div {
  margin-top: 14px;
}

.info-list dt {
  font-size: 0.82rem;
  color: var(--muted);
}

.info-list dd {
  margin: 4px 0 0;
  font-weight: 500;
}

.meaning-list {
  display: grid;
  gap: 16px;
}

.meaning-list li {
  display: grid;
  grid-template-columns: 2.5em 1fr;
  gap: 12px;
  align-items: start;
}

.meaning-list strong {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--gold);
}

.meaning-list span {
  color: var(--muted);
  font-size: 0.94rem;
}

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

.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.service-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -50% auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--teal-dim), transparent 70%);
  pointer-events: none;
}

.service-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gold);
  background: var(--gold-dim);
}

.service-tag {
  margin: 0 0 8px;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--teal);
  text-transform: uppercase;
}

.service-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
}

.service-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.service-note {
  margin-top: 14px !important;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 0.88rem !important;
  color: var(--gold-light) !important;
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.feature-list li {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--muted);
}

.synergy-banner {
  margin-top: 24px;
  padding: 22px 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, var(--gold-dim), var(--teal-dim));
  text-align: center;
}

.synergy-label {
  margin: 0 0 8px;
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-transform: uppercase;
}

.synergy-text {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text);
  line-height: 1.6;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.advantage-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.advantage-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.advantage-num {
  display: block;
  margin-bottom: 12px;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.advantage-card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  font-weight: 600;
}

.advantage-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.timeline {
  position: relative;
  display: grid;
  gap: 0;
  padding-left: 28px;
  border-left: 1px solid var(--line-strong);
}

.timeline-item {
  position: relative;
  padding: 0 0 36px 28px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--gold);
}

.timeline-item--highlight::before {
  background: var(--gold);
  box-shadow: 0 0 16px rgba(201, 169, 98, 0.5);
}

.timeline-item time {
  display: inline-block;
  margin-bottom: 8px;
  padding: 4px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--gold);
  background: var(--gold-dim);
}

.timeline-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
}

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

.timeline-item blockquote {
  margin: 16px 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(201, 169, 98, 0.06);
  color: var(--gold-light);
  font-family: var(--font-serif);
  font-size: 1rem;
  font-style: normal;
  line-height: 1.65;
}

.mission-card {
  margin-top: 12px;
  padding: 32px 36px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  text-align: center;
  background: linear-gradient(135deg, var(--gold-dim), var(--teal-dim));
}

.mission-label {
  margin: 0 0 12px;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  text-transform: uppercase;
}

.mission-text {
  margin: 0;
  max-width: 58ch;
  margin-inline: auto;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
  color: var(--text);
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 18px;
}

.client-card {
  grid-column: span 2;
}

.client-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.client-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.client-card:nth-child(4) {
  grid-column: 2 / span 2;
}

.client-card:nth-child(5) {
  grid-column: 4 / span 2;
}

.client-card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 600;
}

.client-tagline {
  margin: 0 0 12px;
  font-size: 0.86rem;
  color: var(--gold);
}

.client-card p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.trust-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
}

.trust-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--gold-light);
}

.trust-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.commitment-block {
  margin-top: 24px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.2);
}

.commitment-block h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.commitment-block > p {
  margin: 0 0 14px;
  color: var(--muted);
}

.commitment-list {
  display: grid;
  gap: 10px;
}

.commitment-list li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: 0.93rem;
}

.commitment-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

.contact-section {
  margin-bottom: 24px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.contact-card .btn {
  margin-top: 20px;
}

.site-footer {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto 32px;
  padding: 28px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.footer-brand .brand-name {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
}

.footer-brand p:last-child {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-tagline {
  margin: 8px 0 0;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.footer-copy {
  margin: 12px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.footer-icp {
  margin: 10px 0 0;
  font-size: 0.82rem;
}

.footer-icp a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

@media (max-width: 1024px) {
  .hero,
  .about-grid,
  .service-grid,
  .advantage-grid,
  .client-grid,
  .trust-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .client-card,
  .client-card:nth-child(4),
  .client-card:nth-child(5) {
    grid-column: auto;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: rgba(10, 14, 20, 0.96);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .main-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .main-nav a {
    padding: 10px 4px;
  }

  .site-header {
    position: relative;
    flex-wrap: wrap;
  }

  .hero {
    padding: 36px 24px;
  }

  .section {
    padding: 28px 22px;
  }

  .section-header {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .flow-arrow {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 br {
    display: none;
  }
}