/* babiaweb.com — 币安网页版 · Astro-inspired purple-orange gradient */
:root {
  --purple-deep: #1a0533;
  --purple-mid: #3d0f7a;
  --purple-vivid: #7c3aed;
  --purple-light: #a78bfa;
  --orange-vivid: #f97316;
  --orange-light: #fb923c;
  --gradient-hero: linear-gradient(135deg, #1a0533 0%, #2d0a5e 40%, #0f0a2a 100%);
  --gradient-cta: linear-gradient(90deg, #7c3aed 0%, #f97316 100%);
  --gradient-card: linear-gradient(145deg, rgba(124,58,237,0.12) 0%, rgba(249,115,22,0.08) 100%);
  --text-primary: #f5f0ff;
  --text-secondary: #c4b5fd;
  --text-muted: #9c88c8;
  --bg-card: rgba(255,255,255,0.04);
  --border-card: rgba(124,58,237,0.25);
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-glow: 0 0 60px rgba(124,58,237,0.3);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--purple-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── NAV ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(26,5,51,0.88);
  border-bottom: 1px solid rgba(124,58,237,0.2);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}
.nav-logo-mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}
.nav-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-cta {
  padding: 8px 20px;
  background: var(--gradient-cta);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
}
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px 100px;
  background: var(--gradient-hero);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(124,58,237,0.25) 0%, transparent 70%),
              radial-gradient(ellipse 50% 40% at 80% 80%, rgba(249,115,22,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid rgba(249,115,22,0.4);
  border-radius: 100px;
  background: rgba(249,115,22,0.1);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--orange-light);
  margin-bottom: 28px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange-vivid);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  max-width: 820px;
  margin: 0 auto 20px;
}
.hero h1 .accent-orange { color: var(--orange-vivid); }
.hero h1 .accent-purple { color: var(--purple-light); }
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 44px;
  line-height: 1.7;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-cta);
  border: none;
  border-radius: 10px;
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 24px rgba(124,58,237,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(124,58,237,0.5); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(124,58,237,0.4);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.btn-secondary:hover { background: rgba(255,255,255,0.1); transform: translateY(-2px); }
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: center;
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid rgba(124,58,237,0.2);
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 800px;
}
.hero-stat-item {
  text-align: center;
}
.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}
.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── SECTION COMMONS ── */
section { position: relative; }
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 96px 24px;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border: 1px solid rgba(124,58,237,0.5);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--purple-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 56px;
}

/* ── FEATURES GRID ── */
.features { background: rgba(255,255,255,0.01); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, border-color 0.25s;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity 0.25s;
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(124,58,237,0.5); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  position: relative;
  z-index: 1;
}
.feature-icon-purple { background: rgba(124,58,237,0.2); border: 1px solid rgba(124,58,237,0.3); }
.feature-icon-orange { background: rgba(249,115,22,0.15); border: 1px solid rgba(249,115,22,0.3); }
.feature-icon-teal { background: rgba(20,184,166,0.15); border: 1px solid rgba(20,184,166,0.3); }
.feature-icon-pink { background: rgba(236,72,153,0.15); border: 1px solid rgba(236,72,153,0.3); }
.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
  position: relative;
  z-index: 1;
}

/* ── PLATFORM SECTION ── */
.platform { background: linear-gradient(180deg, rgba(61,15,122,0.15) 0%, transparent 100%); }
.platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.platform-visual {
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: var(--radius-xl);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.platform-screen {
  background: rgba(26,5,51,0.8);
  border: 1px solid rgba(124,58,237,0.25);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.platform-screen-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.platform-screen-badge {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.badge-purple { background: rgba(124,58,237,0.25); color: var(--purple-light); }
.badge-orange { background: rgba(249,115,22,0.2); color: var(--orange-light); }
.badge-green { background: rgba(34,197,94,0.2); color: #86efac; }
.platform-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.platform-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.55;
}
.platform-list-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(124,58,237,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  font-size: 0.65rem;
  color: var(--purple-light);
}
.platform-cta-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 32px;
}

/* ── SECURITY SECTION ── */
.security { background: linear-gradient(180deg, transparent 0%, rgba(249,115,22,0.04) 50%, transparent 100%); }
.security-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.security-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(249,115,22,0.15);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: border-color 0.2s;
}
.security-card:hover { border-color: rgba(249,115,22,0.35); }
.security-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--orange-vivid);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.security-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ── CTA STRIP ── */
.cta-strip {
  background: linear-gradient(135deg, var(--purple-mid) 0%, rgba(249,115,22,0.2) 100%);
  border-top: 1px solid rgba(124,58,237,0.3);
  border-bottom: 1px solid rgba(124,58,237,0.3);
}
.cta-strip .section-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 72px 24px;
}
.cta-strip-text h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.cta-strip-text p {
  color: var(--text-secondary);
  max-width: 460px;
  line-height: 1.65;
}
.cta-strip-btns {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}

/* ── FOOTER ── */
.footer {
  background: rgba(10,5,25,0.95);
  border-top: 1px solid rgba(124,58,237,0.15);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .nav-logo {
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 220px;
}
.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 28px;
  border-top: 1px solid rgba(124,58,237,0.1);
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-legal {
  display: flex;
  gap: 20px;
}
.footer-legal a {
  text-decoration: none;
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-legal a:hover { color: var(--text-secondary); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .platform-grid { grid-template-columns: 1fr; }
  .security-grid { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .cta-strip .section-inner { flex-direction: column; align-items: flex-start; }
  .cta-strip-btns { align-items: flex-start; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { min-height: 80vh; padding: 64px 20px 80px; }
  .hero-stats { gap: 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .security-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .platform-visual { padding: 24px; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .hero-ctas { flex-direction: column; align-items: stretch; width: 100%; max-width: 360px; }
}
@media (max-width: 390px) {
  .hero h1 { font-size: 2rem; }
  .section-title { font-size: 1.6rem; }
  .hero-stat-num { font-size: 1.6rem; }
}