/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 50%, #ff1744 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

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

/* Header Styles */
.header {
    text-align: center;
    margin-bottom: 60px;
    padding: 40px 0;
}

.logo-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.app-icon {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: transparent;
}

.logo-image:hover {
    transform: scale(1.05);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.app-info {
    text-align: center;
}

.app-name {
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
}

.app-tagline {
    font-size: 1.2rem;
    color: #fff;
    opacity: 0.9;
    margin-bottom: 5px;
}

.app-url {
    font-size: 1rem;
    color: #fff;
    opacity: 0.8;
    font-family: 'Courier New', monospace;
}

/* 顶部下载区域 */
.top-download-section {
    margin-top: 40px;
    display: flex;
    justify-content: center;
}

.top-download-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    max-width: 350px;
    width: 100%;
    border: 2px solid rgba(255, 107, 53, 0.2);
}

.top-download-card .version-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.top-download-card .version-label {
    color: #666;
    font-size: 0.9rem;
}

.top-download-card .version-number {
    background: linear-gradient(45deg, #ff6b35, #f7931e);
    color: white;
    padding: 6px 12px;
    border-radius: 15px;
    font-weight: 600;
    font-size: 1rem;
}

.top-download-card .platform-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    color: #666;
    font-size: 1rem;
}

.top-download-card .platform-icon {
    font-size: 1.2rem;
}

.top-download-card .download-btn {
    background: linear-gradient(45deg, #ff6b35, #f7931e);
    color: white;
    border: none;
    padding: 15px 35px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0 auto 15px;
    min-width: 180px;
    text-decoration: none;
}

.top-download-card .download-btn.secondary {
    background: linear-gradient(45deg, #2196f3, #21cbf3);
    box-shadow: 0 8px 20px rgba(33, 150, 243, 0.4);
    margin-bottom: 10px;
}

.top-download-card .download-btn.secondary:hover {
    box-shadow: 0 12px 25px rgba(33, 150, 243, 0.6);
}

.top-download-card .download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(255, 107, 53, 0.6);
}

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

.top-download-card .download-tip {
    color: #666;
    font-size: 0.8rem;
    margin-top: 5px;
}

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    color: #fff;
    margin-bottom: 40px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Features Section */
.features {
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px 20px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
}

/* 通用下载按钮样式 */
.download-btn {
    background: linear-gradient(45deg, #ff6b35, #f7931e);
    color: white;
    border: none;
    padding: 18px 40px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 0 auto 20px;
    min-width: 200px;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(255, 107, 53, 0.6);
}

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

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

/* Additional Features */
.additional-features {
    margin-bottom: 60px;
}

.feature-list {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    max-width: 600px;
    margin: 0 auto;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: #333;
}

.feature-item:last-child {
    margin-bottom: 0;
}

.check-icon {
    background: linear-gradient(45deg, #4caf50, #8bc34a);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    flex-shrink: 0;
}

/* Footer */
.footer {
    text-align: center;
    padding: 40px 0;
    color: rgba(255, 255, 255, 0.8);
}

.footer p {
    margin-bottom: 10px;
    font-size: 1rem;
}

.footer p:last-child {
    margin-bottom: 0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        margin-bottom: 40px;
        padding: 20px 0;
    }
    
    .app-icon {
        width: 100px;
        height: 100px;
    }
    
    .logo-image {
        border-radius: 15px;
    }
    
    .app-name {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px 15px;
    }
    
    .top-download-card {
        padding: 20px 15px;
        margin: 0 10px;
    }
    
    .top-download-card .download-btn {
        padding: 12px 25px;
        font-size: 1rem;
        min-width: 160px;
    }
    
    .feature-list {
        padding: 30px 20px;
        margin: 0 10px;
    }
    
    .feature-item {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .app-name {
        font-size: 2rem;
    }
    
    .app-tagline {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .feature-card h3 {
        font-size: 1.3rem;
    }
    
    .top-download-card .download-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        min-width: 140px;
    }
}

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

.feature-card,
.download-card,
.feature-list {
    animation: fadeInUp 0.6s ease-out;
}

.feature-card:nth-child(2) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.3s;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}