:root {
    --binance-yellow: #F3BA2F;
    --binance-black: #0B0E11;
    --binance-gray: #1E2329;
    --binance-border: rgba(243, 186, 47, 0.15);
    --binance-glow: rgba(243, 186, 47, 0.2);
    --text-main: #EAECEF;
    --text-dim: #848E9C;
    --font-mono: 'JetBrains Mono', monospace;
}

body {
    background: var(--binance-black);
    color: var(--text-main);
    margin: 0;
    line-height: 1.6;
}

.container-binance {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 100px;
}

/* 导航 */
.binance-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    border-bottom: 1px solid var(--binance-border);
    margin-bottom: 60px;
}

.stat-badge {
    background: rgba(243, 186, 47, 0.1);
    color: var(--binance-yellow);
    padding: 6px 16px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    font-family: var(--font-mono);
    border: 1px solid var(--binance-border);
}

/* Hero Section */
.binance-hero {
    padding: 60px 0;
}

.hero-label {
    color: var(--binance-yellow);
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 0.8rem;
    letter-spacing: 2px;
    margin-bottom: 24px;
    display: block;
}

.hero-title-binance {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    line-height: 1;
    margin: 0 0 32px;
    letter-spacing: -2px;
}

.hero-desc-binance {
    font-size: 1.4rem;
    color: var(--text-dim);
    max-width: 800px;
    margin-bottom: 48px;
}

/* 按钮 */
.btn-binance-primary {
    background: var(--binance-yellow);
    color: #000;
    padding: 20px 50px;
    font-weight: 800;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: 0.3s;
}

.btn-binance-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px var(--binance-glow);
}

/* 行情看板 */
.ticker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 60px 0;
}

.ticker-card {
    background: var(--binance-gray);
    padding: 30px;
    border: 1px solid var(--binance-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ticker-symbol { font-family: var(--font-mono); font-weight: 800; font-size: 1.2rem; }
.ticker-price { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 800; color: var(--binance-yellow); }
.ticker-change { font-size: 0.85rem; padding: 2px 8px; border-radius: 4px; background: rgba(14, 203, 129, 0.15); color: #0ecb81; }

/* 里程碑时间轴 */
.heritage-timeline {
    margin-top: 60px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.timeline-step {
    padding: 30px;
    background: rgba(255,255,255,0.02);
    border-left: 2px solid var(--binance-yellow);
}

.step-year { font-family: var(--font-mono); font-weight: 800; font-size: 1.8rem; color: var(--binance-yellow); margin-bottom: 12px; }
.step-text { color: var(--text-dim); font-size: 0.9rem; }

/* 生态架构 */
.eco-pyramid {
    margin-top: 60px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.eco-layer {
    padding: 40px;
    background: var(--binance-gray);
    border: 1px solid var(--binance-border);
    transition: 0.3s;
}

.eco-layer:hover { border-color: var(--binance-yellow); background: rgba(243, 186, 47, 0.03); }
.layer-label { font-family: var(--font-mono); font-size: 0.7rem; color: var(--binance-yellow); text-transform: uppercase; margin-bottom: 10px; display: block; }
.layer-title { font-size: 1.5rem; font-weight: 800; margin-bottom: 10px; }
.layer-desc { color: var(--text-dim); font-size: 0.95rem; }

/* 核心特性 (原有概念卡片升级版) */
.features-grid {
    margin-top: 60px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.feature-card {
    padding: 48px;
    background: var(--binance-gray);
    border: 1px solid var(--binance-border);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: rgba(243, 186, 47, 0.1);
    color: var(--binance-yellow);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

/* FAQ 20条 */
.faq-section-binance {
    margin-top: 60px;
}

.faq-grid-binance {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 40px;
}

.faq-item-binance {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--binance-border);
    padding: 30px;
    transition: 0.3s;
}

.faq-q { color: var(--binance-yellow); font-weight: 800; margin-bottom: 12px; }
.faq-a { color: var(--text-dim); font-size: 0.9rem; line-height: 1.6; }

.content-section { padding: 60px 0; }

/* Footer */
.binance-footer {
    margin-top: 150px;
    text-align: center;
    padding-bottom: 100px;
}

.footer-line { height: 1px; background: linear-gradient(90deg, transparent, var(--binance-yellow), transparent); margin-bottom: 80px; }

.btn-back {
    padding: 6px 16px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-decoration: none;
    transition: 0.3s;
    border-radius: 4px;
}

.btn-back span {
    margin-left: 6px;
}

.btn-back:hover {
    background: rgba(255, 255, 255, 0.1);
}
@media (max-width: 1024px) {
    .features-grid, .faq-grid-binance { grid-template-columns: 1fr; }
    .hero-title-binance { font-size: 3.5rem; }
}
@media (max-width: 768px) {
    .btn-back span {
        display: none;
    }

    .btn-back {
        padding: 6px 12px;
    }
}