:root {
    --primary-color: #00d4ff;
    --secondary-color: #0077ff;
    --background-dark: #0a0e17;
    --card-bg: rgba(25, 35, 60, 0.7);
    --text-primary: #e0e7ff;
    --text-secondary: #a0aec0;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: #e2e8f0;
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    max-width: 900px;
    width: 100%;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow:
        0 10px 30px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(0, 212, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    z-index: -1;
}

/* 标题样式 */
.title {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

.title P {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(90deg, #00d4ff, #00b3d9, #0088cc);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.title::after {
    content: '';
    display: block;
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    margin: 15px auto;
    border-radius: 2px;
}

/* 介绍部分 */
.introduction {
    background: rgba(30, 41, 59, 0.6);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 40px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}
.title h1 {
    font-size: 1.4rem;
    margin-top: 5px;
    margin-bottom: 15px;
    color: #00d4ff;
    display: flex;
    align-items: center;
    gap: 10px;

    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 10px;
    font-weight: 800;
    letter-spacing: 1px;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    opacity: 0.8;
}
.introduction h2 {
    font-size: 1.4rem;
    margin-top: 5px;
    margin-bottom: 15px;
    color: #00d4ff;
    display: flex;
    align-items: center;
    gap: 10px;
}
.introduction h3 {
    font-size: 1rem;
    margin-top: 5px;
    margin-bottom: 15px;
    color: #00d4ff;
    display: flex;
    align-items: center;
    gap: 10px;
}
.screenshot-section h3 {
    font-size: 1rem;
    margin-top: 5px;
    margin-bottom: 15px;
    color: #00d4ff;
    display: flex;
    align-items: center;
    gap: 10px;
}
.introduction p {
    font-size: 1.2rem;
    line-height: 1.7;
    color: #cbd5e1;
    white-space: pre-wrap;
    margin-bottom: 15px;
}

/* 界面截图部分 */
.screenshot-section {
    margin-bottom: 40px;
    text-align: center;
}

.screenshot-section h1 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #00d4ff;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.screenshot-container {
    position: relative;
    display: inline-block;
    border-radius: 12px;
    overflow: hidden;
    box-shadow:
        0 10px 30px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(0, 212, 255, 0.2);
    max-width: 100%;
}

.screenshot-container img {
    display: block;
    width: 100%;
    height: auto;
    border: none;
}

.screenshot-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 12px;
    box-shadow: inset 0 0 20px rgba(0, 212, 255, 0.3);
    pointer-events: none;
}

/* 下载按钮 */
.download-section {
    text-align: center;
    margin-bottom: 30px;
}

.download-flxe {
    display: flex;
}

.download-section h1 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: #00d4ff;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.download-btn {
    margin-right: 15px;
    position: relative;
    width: 220px;
    height: 60px;
    background: linear-gradient(135deg, #00d4ff, #0088cc);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow:
        0 4px 15px rgba(0, 212, 255, 0.4),
        0 0 0 4px rgba(0, 212, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow:
        0 8px 25px rgba(0, 212, 255, 0.6),
        0 0 0 6px rgba(0, 212, 255, 0.2);
}

.download-btn:active {
    transform: translateY(1px);
    box-shadow:
        0 2px 10px rgba(0, 212, 255, 0.4),
        0 0 0 4px rgba(0, 212, 255, 0.15);
}

.download-btn::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 20px;
    height: 200%;
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(25deg);
    transition: all 0.6s;
}

.download-btn:hover::after {
    left: 120%;
}

/* 版权声明 */
.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 212, 255, 0.2);
    color: #94a3b8;
    font-size: 0.95rem;
    line-height: 1.6;
}

.copyright a {
    color: #00d4ff;
    text-decoration: none;
    transition: all 0.3s;
}

.copyright a:hover {
    text-decoration: underline;
    color: #00b3d9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 25px;
    }

    .title P {
        font-size: 2.2rem;
    }

    .download-btn {
        width: 180px;
        height: 50px;
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 15px;
    }

    .title P {
        font-size: 1.8rem;
    }

    .introduction,
    .screenshot-section,
    .download-section {
        padding: 0 10px;
    }

    .download-btn {
        width: 160px;
        height: 45px;
        font-size: 1rem;
    }
}


.back-to-top {
position: fixed;
bottom: 30px;
right: 30px;
width: 56px;
height: 56px;
background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
color: white;
border: none;
border-radius: 50%;
cursor: pointer;
display: flex;
align-items: center;
justify-content: center;
font-size: 14px;
/* 模拟标题的蓝色渐变辉光阴影：深蓝底 + 多层蓝色半透明外发光 */
box-shadow:
0 0 8px rgba(0, 212, 255, 0.4),
0 0 16px rgba(0, 212, 255, 0.3),
0 0 24px rgba(0, 212, 255, 0.2),
0 0 32px rgba(0, 212, 255, 0.15);
opacity: 0;
visibility: hidden;
transform: translateY(10px);
transition: all 0.3s cubic-bezier(0.17, 0.67, 0.88, 1.01);
z-index: 1000;
}

.back-to-top.visible {
opacity: 1;
visibility: visible;
transform: translateY(0);
}

.back-to-top:hover {
background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
transform: translateY(-3px);
box-shadow:
0 0 12px rgba(0, 212, 255, 0.6),
0 0 20px rgba(0, 212, 255, 0.4),
0 0 32px rgba(0, 212, 255, 0.3),
0 0 48px rgba(0, 212, 255, 0.2);
}

.back-to-top:active {
transform: translateY(1px);
box-shadow:
0 0 6px rgba(0, 212, 255, 0.4),
0 0 12px rgba(0, 212, 255, 0.25),
0 0 20px rgba(0, 212, 255, 0.15);
}

     /* 通知框样式 - 左上角定位，匹配深色科技风格 */
     .notification {
        position: fixed;
        top: 20px;              /* 改为顶部 */
        left: 20px;             /* 改为左侧 */
        background: rgba(15, 23, 42, 0.9); /* 深蓝黑半透 */
        backdrop-filter: blur(10px);       /* 毛玻璃 */
        border: 1px solid rgba(59, 130, 246, 0.3); /* 主色边框 */
        border-radius: 12px;               /* 圆角 */
        padding: 16px 20px;
        box-shadow: 
            0 8px 32px rgba(59, 130, 246, 0.2), /* 主色发光阴影 */
            0 0 0 1px rgba(59, 130, 246, 0.1);
        z-index: 1000;
        display: none;                     /* 默认隐藏 */
        max-width: 320px;
        font-family: 'Segoe UI', system-ui, sans-serif;
        color: #e5e7eb;                    /* 浅灰白文字 */
        animation: slideInLeft 0.4s ease-out forwards; /* 动画改为从左滑入 */
    }
    
    /* 从左滑入动画 */
    @keyframes slideInLeft {
        from { transform: translateX(-120%); opacity: 0; } /* 从左边外侧滑入 */
        to { transform: translateX(0); opacity: 1; }
    }
    
    /* 退出动画 - 淡出即可 */
    @keyframes fadeOut {
        from { opacity: 1; }
        to { opacity: 0; }
    }
    
    .notification.fade-out {
        animation: fadeOut 0.4s ease-in forwards;
    }