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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #ffffff;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0f0f0f;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 2rem;
    text-align: center;
}

.hero {
    animation: fadeInUp 1s ease-out;
}

.logo {
    margin-bottom: 3rem;
}

.brand {
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(45deg, #FF0000, #CC0000);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 4px 8px rgba(255,0,0,0.2);
    letter-spacing: -0.02em;
}

.slogan-container {
    margin-bottom: 4rem;
}

.slogan {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #0f0f0f;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    animation: slideInFromLeft 1s ease-out 0.3s both;
}

.subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    color: #606060;
    animation: slideInFromRight 1s ease-out 0.5s both;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
    padding: 0 1rem;
}

.feature {
    background: linear-gradient(135deg, #ffffff 0%, #f8f8f8 100%);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    border: 2px solid #f0f0f0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 1s ease-out 0.7s both;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    position: relative;
    overflow: hidden;
}

.feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #FF0000, #CC0000);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-8px) scale(1.02);
    background: linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
    box-shadow: 0 12px 40px rgba(255,0,0,0.15);
    border-color: #FF0000;
}

.feature:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: block;
    transition: transform 0.3s ease;
}

.feature:hover .feature-icon {
    transform: scale(1.1);
}

.feature h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #0f0f0f;
    transition: color 0.3s ease;
}

.feature:hover h3 {
    color: #FF0000;
}

.feature p {
    font-size: 1rem;
    color: #606060;
    line-height: 1.6;
    margin: 0;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .brand {
        font-size: 3rem;
    }
    
    .slogan {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .features {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-top: 3rem;
        padding: 0;
    }
    
    .feature {
        padding: 2rem 1.5rem;
        border-radius: 12px;
    }
    
    .feature-icon {
        font-size: 3rem;
        margin-bottom: 1.2rem;
    }
    
    .feature h3 {
        font-size: 1.3rem;
        margin-bottom: 0.8rem;
    }
    
    .feature p {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .brand {
        font-size: 2.5rem;
    }
    
    .slogan {
        font-size: 1.5rem;
    }
    
    .logo {
        margin-bottom: 2rem;
    }
    
    .slogan-container {
        margin-bottom: 3rem;
    }
}