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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    color: #fff;
    min-height: 100vh;
    overflow-x: hidden;
}

.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    animation: float 20s infinite ease-in-out;
}

.bg-circle:nth-child(1) {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.bg-circle:nth-child(2) {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 15%;
    animation-delay: -5s;
}

.bg-circle:nth-child(3) {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 30%;
    animation-delay: -10s;
}

.bg-circle:nth-child(4) {
    width: 250px;
    height: 250px;
    top: 30%;
    right: 30%;
    animation-delay: -15s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.9);
    }
    75% {
        transform: translate(20px, 30px) scale(1.05);
    }
}

.header {
    text-align: center;
    padding: 60px 20px 40px;
}

.title {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(90deg, #00d4ff, #7b2cbf, #ff6b6b, #00d4ff);
    background-size: 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient 8s linear infinite;
    margin-bottom: 10px;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    100% {
        background-position: 300% 50%;
    }
}

.subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 2px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 60px;
}

.section {
    margin-bottom: 50px;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-left: 15px;
    border-left: 4px solid #00d4ff;
    color: rgba(255, 255, 255, 0.9);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 25px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    text-decoration: none;
    color: #fff;
    transition: all 0.3s ease;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.card:hover::before {
    left: 100%;
}

.card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(0, 212, 255, 0.5);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 212, 255, 0.2);
}

.card.featured {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(123, 44, 191, 0.2));
    border-color: rgba(0, 212, 255, 0.3);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #fff;
}

.card-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    flex-grow: 1;
}

.card-arrow {
    position: absolute;
    right: 20px;
    bottom: 20px;
    font-size: 1.5rem;
    color: rgba(0, 212, 255, 0.5);
    transition: all 0.3s ease;
}

.card:hover .card-arrow {
    color: #00d4ff;
    transform: translateX(5px);
}

.footer {
    text-align: center;
    padding: 30px 20px;
    background: rgba(0, 0, 0, 0.2);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .title {
        font-size: 3rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .header {
        padding: 40px 20px 30px;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 2.5rem;
    }

    .card {
        padding: 20px;
    }

    .card-icon {
        font-size: 2rem;
    }

    .card-title {
        font-size: 1rem;
    }
}