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

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, sans-serif;
    background: #0f0f1e;
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3), transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 75, 145, 0.3), transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(138, 43, 226, 0.2), transparent 50%);
    z-index: 0;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.header {
    text-align: center;
    padding: 60px 30px 40px;
    color: white;
}

.header h1 {
    font-size: 3.5em;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #667eea 0%, #ff4b91 50%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1.3em;
    color: #b8b8d1;
    font-weight: 300;
}

.main-content {
    padding: 0 30px 40px;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-bottom: 50px;
}

.btn {
    padding: 18px 45px;
    font-size: 1.15em;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.5s ease;
}

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

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-icon {
    font-size: 1.3em;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(245, 87, 108, 0.4);
}

.btn-accent {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.4);
}

.intro {
    text-align: center;
    margin-bottom: 50px;
    padding: 0 20px;
}

.intro h2 {
    color: #ffffff;
    margin-bottom: 20px;
    font-size: 2.2em;
    font-weight: 700;
}

.intro p {
    color: #b8b8d1;
    line-height: 1.9;
    font-size: 1.1em;
    max-width: 900px;
    margin: 0 auto;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 30px 25px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
    border-color: rgba(102, 126, 234, 0.5);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card h3 {
    color: #ffffff;
    margin-bottom: 12px;
    font-size: 1.35em;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.feature-card p {
    color: #b8b8d1;
    line-height: 1.7;
    font-size: 1em;
    position: relative;
    z-index: 1;
}

.footer {
    padding: 30px 20px;
    text-align: center;
    color: #7a7a9d;
    font-size: 0.95em;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 2.5em;
    }
    
    .intro h2 {
        font-size: 1.8em;
    }
    
    .features {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .actions {
        flex-direction: column;
        padding: 0 20px;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: linear-gradient(135deg, rgba(15, 15, 30, 0.95) 0%, rgba(30, 30, 50, 0.95) 100%);
    padding: 40px;
    border-radius: 20px;
    max-width: 500px;
    width: 90%;
    position: relative;
    border: 1px solid rgba(102, 126, 234, 0.3);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideIn 0.3s ease;
}

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

.close {
    color: #b8b8d1;
    position: absolute;
    top: 15px;
    right: 25px;
    font-size: 35px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: #ffffff;
}

.modal-image {
    max-width: 100%;
    max-height: 400px;
    width: auto;
    height: auto;
    display: block;
    margin: 0 auto 25px;
    border-radius: 12px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    object-fit: contain;
}

.modal-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.modal-btn {
    width: 100%;
    justify-content: center;
}

@media (max-width: 768px) {
    .modal-content {
        padding: 30px 20px;
        width: 95%;
    }
}