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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    background: transparent;
    color: #333;
    min-height: 100vh;
    width: 100%;
    overflow-x: hidden;
}

/* 视频背景 */
.video-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.video-background video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 返回按钮样式 */
.back-to-home {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.back-to-home a {
    display: inline-block;
    padding: 10px 20px;
    background: rgba(25, 25, 35, 0.3);
    backdrop-filter: blur(8px);
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.back-to-home a:hover {
    background: rgba(45, 45, 55, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* 三角形容器和框架样式 */
.triangle-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999;
    }

/* 框架样式 */
.triangle-frame {
    background: rgba(25, 25, 35, 0.2);
    backdrop-filter: blur(8px);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto;
    width: 200px;
    }

/* 三角形样式 */
.triangle {
    width: 0;
    height: 0;
    border-left: 30px solid transparent;
    border-right: 30px solid transparent;
    border-top: 45px solid #ff0000;
}

/* 响应式设计 */
@media screen and (max-width: 1200px) {
    .triangle-frame {
        width: 180px;
    }
}

@media screen and (max-width: 768px) {
    .triangle-container {
        padding: 20px;
    }

    .triangle-frame {
        width: 90%;
        max-width: 180px;
    }
    
    .triangle {
        border-left: 20px solid transparent;
        border-right: 20px solid transparent;
        border-top: 30px solid #ff0000;
    }
}

/* 内容容器 */
.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: rgba(25, 25, 35, 0.2);
    backdrop-filter: blur(8px);
    border-radius: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}