/* YieldBot - 收益机器人网络 · 全局样式 */
:root {
  --primary: #00E676;
  --primary-dark: #00C853;
  --gold: #FFD600;
  --dark: #0A0E17;
  --dark-2: #111827;
  --blue: #1E3A5F;
  --silver: #B0BEC5;
  --danger: #ff5252;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--dark); color: #e0e0e0; line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: color .3s; }
a:hover { color: #69F0AE; }
img { max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Text colors */
.text-primary { color: var(--primary); }
.text-gold { color: var(--gold); }
.text-silver { color: var(--silver); }
.text-white { color: #fff; }

/* Buttons */
.btn { display: inline-block; padding: 12px 28px; border-radius: 8px; font-size: 15px; font-weight: 600; cursor: pointer; transition: all .3s; border: none; text-align: center; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: var(--dark); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,230,118,0.3); }
.btn-outline { background: transparent; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: rgba(0,230,118,0.1); }
.btn-gold { background: linear-gradient(135deg, var(--gold), #FFC107); color: var(--dark); }
.btn-lg { padding: 16px 36px; font-size: 17px; }

/* Section */
.section { padding: 80px 0; }
.section-title { font-size: 32px; color: #fff; text-align: center; margin-bottom: 12px; }
.section-subtitle { font-size: 16px; color: var(--silver); text-align: center; margin-bottom: 48px; }
.section-dark { background: var(--dark-2); }

/* Cards */
.card { background: var(--dark-2); border: 1px solid var(--blue); border-radius: 12px; padding: 24px; transition: all .3s; }
.card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,230,118,0.08); }

/* Grid */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* Badge */
.badge { display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 500; }

/* Hero */
.hero { padding: 120px 0 80px; text-align: center; background: linear-gradient(180deg, var(--dark) 0%, var(--dark-2) 100%); position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(ellipse at center, rgba(0,230,118,0.03) 0%, transparent 70%); animation: heroGlow 8s ease-in-out infinite; }
@keyframes heroGlow { 0%, 100% { transform: translate(0,0); } 50% { transform: translate(5%,5%); } }
.hero h1 { font-size: 52px; font-weight: 800; color: #fff; margin-bottom: 16px; line-height: 1.2; position: relative; }
.hero h1 span { background: linear-gradient(135deg, var(--primary), var(--gold)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 18px; color: var(--silver); max-width: 700px; margin: 0 auto 32px; position: relative; }
.hero-actions { display: flex; gap: 16px; justify-content: center; position: relative; }
.hero-stats { display: flex; justify-content: center; gap: 40px; margin-top: 60px; position: relative; }
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 36px; font-weight: 800; color: var(--primary); }
.hero-stat .label { font-size: 13px; color: var(--silver); margin-top: 4px; }

/* Navbar */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 16px 0; background: rgba(10,14,23,0.9); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(30,58,95,0.3); }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.navbar .logo { font-size: 22px; font-weight: 800; color: var(--primary); }
.navbar nav { display: flex; gap: 24px; align-items: center; }
.navbar nav a { color: var(--silver); font-size: 14px; }
.navbar nav a:hover { color: var(--primary); }

/* Feature cards */
.feature-icon { font-size: 36px; margin-bottom: 16px; }
.feature-card h3 { color: #fff; font-size: 18px; margin-bottom: 8px; }
.feature-card p { color: var(--silver); font-size: 14px; }

/* Pricing table */
.pricing-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.pricing-card { background: var(--dark-2); border: 1px solid var(--blue); border-radius: 12px; padding: 24px; text-align: center; transition: all .3s; position: relative; }
.pricing-card.featured { border-color: var(--gold); box-shadow: 0 0 40px rgba(255,214,0,0.1); }
.pricing-card.featured::before { content: '🔥 最推荐'; position: absolute; top: -10px; left: 50%; transform: translateX(-50%); background: var(--gold); color: var(--dark); padding: 2px 16px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.pricing-card h3 { color: #fff; font-size: 16px; margin-bottom: 8px; }
.pricing-card .price { font-size: 28px; font-weight: 800; color: var(--primary); margin-bottom: 4px; }
.pricing-card .price-note { color: var(--silver); font-size: 12px; margin-bottom: 16px; }
.pricing-card ul { list-style: none; text-align: left; }
.pricing-card ul li { padding: 6px 0; font-size: 13px; color: var(--silver); }
.pricing-card ul li::before { content: '✅ '; }

/* Footer */
.footer { background: var(--dark-2); border-top: 1px solid var(--blue); padding: 40px 0; text-align: center; }
.footer p { color: var(--silver); font-size: 13px; }
.footer .links { display: flex; justify-content: center; gap: 24px; margin-bottom: 16px; }
.footer .links a { color: var(--silver); font-size: 13px; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--blue); }
.faq-question { width: 100%; background: none; border: none; color: #fff; font-size: 16px; padding: 20px 0; display: flex; justify-content: space-between; align-items: center; cursor: pointer; }
.faq-question:hover { color: #00E676; }
.faq-question svg { transition: transform .3s; flex-shrink: 0; margin-left: 12px; }
.faq-question.active svg { transform: rotate(180deg); }
.faq-answer { display: none; padding: 0 0 20px; color: var(--silver); font-size: 14px; line-height: 1.8; }
.faq-answer.open { display: block; }

/* Animations */
.fade-in { animation: fadeIn .6s ease-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* Responsive */
@media (max-width: 1024px) {
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 16px; }
  .hero-stats { flex-direction: column; gap: 20px; }
  .grid-2, .grid-3, .grid-4, .pricing-grid { grid-template-columns: 1fr; }
  .navbar nav { display: none; }
  .section { padding: 48px 0; }
  .section-title { font-size: 24px; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: var(--blue); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }