:root {
    --primary: #000000;
    --accent: #00FF94;
    --text: #333333;
    --light: #FFFFFF;
    --gray: #666666;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--light);
    color: var(--text);
    line-height: 1.2;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--light);
    z-index: 1000;
    padding: 2rem;
}

.nav-content {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

/* 主要内容区域 */
.hero {
    padding: 10rem 2rem 4rem;
    background: #F0F2ED;
}

.hero-content {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
}

.hero h1 {
    flex:1;
    font-size: 8rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 4rem;
    text-transform: uppercase;
    letter-spacing: -2px;
}

.hero-cards {
    display: flex;
    gap: 2rem;
}

.chart-card {
    width: 280px;
    height: auto;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* 特性区域 */
.features {
    padding: 6rem 2rem;
    background: var(--light);
}

.features-grid {
    max-width: 1440px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4rem;
}

.feature-item {
    padding: 2rem 0;
}

.feature-item h2 {
    font-size: 7rem;
    font-weight: 900;
    color: var(--primary);
    margin-bottom: 1rem;
    line-height: 1;
}

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.feature-item p {
    font-size: 1rem;
    color: var(--gray);
    line-height: 1.5;
}

/* 统计数字区域 */
.stats {
    padding: 6rem 2rem;
    background:#F0F2ED;
    border-top: 1px solid rgba(0,0,0,0.1);
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.stats-grid {
    max-width: 1440px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.counter {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary);
    margin: 0.5rem 0;
}

.stat-label {
    font-size: 1rem;
    color: var(--gray);
}

/* 增长图表区域 */
.growth-chart {
    padding: 6rem 2rem;
    background: var(--primary);
    color: var(--light);
}

.growth-chart h2 {
    max-width: 1440px;
    margin: 0 auto 3rem;
    font-size: 2rem;
    font-weight: 700;
}

.chart-container {
    max-width: 1440px;
    margin: 0 auto;
    position: relative;
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 20px;
}

.growth-image {
    width: 100%;
    height: auto;
}

.chart-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.chart-point {
    position: absolute;
    color: var(--accent);
    font-weight: 700;
}

/* 品牌展示区域 */
.brands {
    padding: 6rem 2rem;
    background: var(--light);
}

.brands h2 {
    max-width: 1440px;
    margin: 0 auto 3rem;
    font-size: 2.5rem;
    font-weight: 700;
}

.brands-grid {
    max-width: 1440px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 3rem;
    align-items: center;
}

.brands-grid img {
    width: 100%;
    height: auto;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.brands-grid img:hover {
    opacity: 1;
}

/* CTA区域 */
.cta {
    padding: 8rem 2rem;
    background: var(--primary);
    color: var(--light);
}

.cta-content {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.cta h2 {
    font-size: 6rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 2rem;
    text-transform: uppercase;
}

.app-buttons {
    display: flex;
    gap: 1rem;
}

.app-btn {
    background: var(--light);
    color: var(--primary);
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 动画类 */
[data-animate] {
    opacity: 0;
}

.animate__fadeInUp {
    opacity: 1;
    animation-duration: 1s;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero h1 {
        font-size: 6rem;
    }

    .features-grid,
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .brands-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 4rem;
    }

    .hero-cards {
        flex-direction: column;
    }

    .chart-card {
        width: 100%;
    }

    .features-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .brands-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .cta-content {
        flex-direction: column;
        text-align: center;
    }

    .cta h2 {
        font-size: 4rem;
    }

    .app-buttons {
        flex-direction: column;
        align-items: center;
    }
}