/* ===================================
   首页着陆页样式 - Landing Page
   =================================== */

body.landing-page {
    overflow-x: hidden;
    overflow-y: auto;
    position: relative;
    min-height: 100vh;
}

.landing-page .container {
    text-align: center;
    color: white;
    z-index: 10;
    position: relative;
    padding: 40px 20px;
}

/* Logo */
.logo {
    font-size: 120px;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

h1 {
    font-size: 48px;
    margin-bottom: 15px;
    text-shadow: 0 5px 20px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 24px;
    margin-bottom: 50px;
    opacity: 0.9;
}

/* 按钮组 */
.buttons {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.buttons .btn {
    padding: 20px 50px;
    font-size: 20px;
    font-weight: bold;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.buttons .btn-primary {
    background: white;
    color: #667eea;
}

.buttons .btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.4);
}

.buttons .btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid white;
}

.buttons .btn-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-5px);
}

/* 特性展示 */
.features {
    margin-top: 80px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.feature {
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s;
}

.feature:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.2);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.feature-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 14px;
    opacity: 0.8;
}

/* 背景动画装饰 */
.bg-decoration {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.circle1 {
    width: 300px;
    height: 300px;
    background: white;
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.circle2 {
    width: 200px;
    height: 200px;
    background: white;
    bottom: -50px;
    right: 100px;
    animation-delay: 2s;
}

.circle3 {
    width: 150px;
    height: 150px;
    background: white;
    top: 50%;
    right: -50px;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-30px);
    }
}

/* 响应式 */
@media (max-width: 768px) {
    body.landing-page {
        padding: 0;
    }
    
    .landing-page .container {
        padding: 30px 15px;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    
    h1 {
        font-size: 32px;
        margin-bottom: 10px;
    }
    
    .subtitle {
        font-size: 16px;
        margin-bottom: 30px;
    }
    
    .logo {
        font-size: 80px;
        margin-bottom: 15px;
    }
    
    .buttons {
        gap: 15px;
        margin-bottom: 40px;
    }
    
    .buttons .btn {
        padding: 15px 35px;
        font-size: 16px;
        width: 100%;
        max-width: 280px;
    }
    
    .features {
        margin-top: 40px;
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 10px;
    }
    
    .feature {
        padding: 25px 20px;
    }
    
    .feature-icon {
        font-size: 36px;
        margin-bottom: 10px;
    }
    
    .feature-title {
        font-size: 18px;
        margin-bottom: 8px;
    }
    
    .feature-desc {
        font-size: 13px;
    }
    
    /* 背景装饰在手机端缩小 */
    .circle1 {
        width: 200px;
        height: 200px;
    }
    
    .circle2 {
        width: 150px;
        height: 150px;
    }
    
    .circle3 {
        width: 100px;
        height: 100px;
    }
}