/* 全站背景：齿轮线稿（浅色遮罩，保证内容可读） */
html {
    background-color: #f3f5f4;
}

body {
    background-color: transparent !important;
    background-image: none !important;
    position: relative;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background:
        linear-gradient(
            115deg,
            rgba(255, 255, 255, 0.92) 0%,
            rgba(238, 247, 240, 0.88) 42%,
            rgba(255, 255, 255, 0.94) 100%
        ),
        url("/static/images/bg/site-bg-gears.jpg") left center / cover no-repeat;
    background-attachment: fixed;
}

/* 内容层默认半透白，让齿轮纹理若隐若现 */
.main-content,
.home-wrap,
.forum-wrap,
.content-wrap {
    position: relative;
    z-index: 0;
}

@media (max-width: 768px) {
    body::before {
        background-attachment: scroll;
        background-position: left top;
        background-size: 160% auto;
    }
}