:root {
  --bg: #040812;
  --bg-alt: #070c1a;
  --card-bg: #0c1224;
  --card-bg-alt: #0f162b;
  --accent: #4b8dff;
  --accent-soft: rgba(75, 141, 255, 0.16);
  --accent-strong: #5bd4ff;
  --text-main: #f7f9ff;
  --text-muted: #9ca3c7;
  --border-subtle: rgba(148, 163, 255, 0.24);
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.75);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --container-width: 1100px;
  --section-padding: 80px;
  --transition-fast: 0.18s ease-out;
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, -system-ui,
    "PingFang SC", "Segoe UI", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top, #111827 0, #020617 45%, #000 100%);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
}

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

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(20px);
  background: linear-gradient(to bottom, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.75));
  border-bottom: 1px solid rgba(148, 163, 255, 0.16);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  height: 34px;
}

.logo-text {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
}

.main-nav a {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast),
    transform var(--transition-fast);
}

.main-nav a:hover {
  color: var(--text-main);
  background: rgba(15, 23, 42, 0.9);
  transform: translateY(-1px);
}

/* Hero */
.hero {
  padding: calc(var(--section-padding) + 20px) 0 var(--section-padding);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle at left, rgba(91, 212, 255, 0.4), rgba(59, 130, 246, 0.04));
  color: var(--accent-strong);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 18px 0 12px;
  font-size: 34px;
  line-height: 1.2;
}

.hero-subtitle {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}

.hero-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 18px;
}

.badge {
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(91, 212, 255, 0.6);
  background: linear-gradient(135deg, rgba(75, 141, 255, 0.16), rgba(15, 23, 42, 0.9));
  font-size: 12px;
  color: #e0f2fe;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 130px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast),
    transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn.primary {
  background: linear-gradient(135deg, #4b8dff, #5bd4ff);
  box-shadow: 0 16px 40px rgba(59, 130, 246, 0.55);
  color: #0b1220;
}

.btn.primary:hover {
  transform: translateY(-1.5px);
  box-shadow: 0 18px 50px rgba(59, 130, 246, 0.7);
}

.btn.ghost {
  border-color: rgba(148, 163, 255, 0.5);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-main);
}

.btn.ghost:hover {
  background: rgba(15, 23, 42, 1);
  border-color: rgba(129, 140, 248, 0.9);
}

.hero-panel {
  display: flex;
  justify-content: flex-end;
}

.hero-card {
  width: 100%;
  max-width: 360px;
  padding: 20px 20px 22px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(91, 212, 255, 0.25), transparent 60%),
    linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.94));
  border: 1px solid rgba(148, 163, 255, 0.35);
  box-shadow: 0 20px 55px rgba(15, 23, 42, 0.9);
}

.hero-card h2 {
  margin: 0 0 10px;
  font-size: 18px;
}

.hero-card ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Sections */
.section {
  padding: var(--section-padding) 0;
}

.section-alt {
  background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.9), #020617 55%);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 32px;
}

.section-header h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.section-header p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: flex-start;
}

.section-text p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
}

.section-text h2 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 22px;
}

.section-box {
  padding: 18px 18px 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.9));
  border: 1px solid rgba(148, 163, 255, 0.35);
  box-shadow: var(--shadow-soft);
}

.section-box h3 {
  margin: 0 0 12px;
  font-size: 16px;
}

.icon-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

.icon-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
}

.icon-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: linear-gradient(135deg, #4b8dff, #5bd4ff);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card {
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  background: radial-gradient(circle at top left, rgba(75, 141, 255, 0.16), #020617);
  border: 1px solid rgba(148, 163, 255, 0.3);
  box-shadow: 0 14px 40px rgba(15, 23, 42, 0.85);
  font-size: 14px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 15px;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.platform-column {
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.9));
  border: 1px solid rgba(148, 163, 255, 0.28);
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.85);
  font-size: 14px;
}

.platform-column h3 {
  margin: 0 0 10px;
  font-size: 15px;
}

.platform-column ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-muted);
  line-height: 1.7;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.team-card {
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.9));
  border: 1px solid rgba(148, 163, 255, 0.28);
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.85);
  font-size: 14px;
  color: var(--text-muted);
}

.team-card h3 {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--text-main);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.contact-section .section-text h2 {
  font-size: 22px;
}

.contact-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  font-size: 14px;
  color: var(--text-muted);
}

.contact-list li {
  margin-bottom: 6px;
}

.placeholder {
  color: #f97316;
}

/* Footer */
.site-footer {
  padding: 26px 0 30px;
  border-top: 1px solid rgba(148, 163, 255, 0.16);
  background: radial-gradient(circle at center, rgba(15, 23, 42, 0.95), #020617 60%);
}

.footer-inner {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

.footer-note {
  margin-top: 4px;
}

.site-footer a {
  color: var(--text-muted);
  text-decoration: none;
}
.site-footer a:hover {
  color: var(--accent-strong);
}

/* Responsive */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.1fr);
  }

  .hero-panel {
    justify-content: flex-start;
  }

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

  .cards-grid,
  .platform-grid,
  .team-grid,
  .results-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .main-nav {
    display: none;
  }
}

@media (max-width: 640px) {
  :root {
    --section-padding: 56px;
  }

  .hero h1 {
    font-size: 26px;
  }

  .hero-subtitle {
    font-size: 14px;
  }

  .section-header h2 {
    font-size: 20px;
  }

  .section-text h2 {
    font-size: 20px;
  }
}