/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

:root { --primary-color: #4285f4; --secondary-color: #34a853; --text-color: #333; --bg-color: #f8f9fa; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; line-height: 1.6; color: var(--text-color); margin: 0; padding: 0; background-color: var(--bg-color); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
header h1 {display: flex;}
header { background: #fff; padding: 15px 0; z-index: 100; }
nav { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 24px; font-weight: bold; color: var(--text-color); text-decoration: none; display: flex; align-items: center; }
.logo span { color: var(--primary-color); }
.hero {text-align: center;padding: 40px 0;background: linear-gradient(135deg, #fff 0%, #f1f3f4 100%);}
.hero h2 {font-size: 42px;margin-bottom: 10px;color: #202124;}
.hero p {font-size: 20px;color: #5f6368;max-width: 800px;margin: 0 auto 20px;}
.download-btn { display: inline-block; background-color: var(--primary-color); color: #fff; padding: 18px 40px; font-size: 20px; border-radius: 50px; text-decoration: none; transition: transform 0.2s, box-shadow 0.2s; font-weight: 500; box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3); }
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(66, 133, 244, 0.4); background-color: #3367d6; }
.download-sub {margin-top: 15px;font-size: 14px;color: #80868b;display: flex;align-items: center;justify-content: center;column-gap: 8px;}
.download-sub span em {font-style: normal;}
.features { padding: 60px 0; background: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 40px; }
.feature-card { padding: 30px; border-radius: 12px; background: #f8f9fa; transition: 0.3s; border: 1px solid #e8eaed; }
.feature-card:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.feature-icon { font-size: 40px; margin-bottom: 20px; display: block; }
.content-section { padding: 60px 0; background: #fff; border-top: 1px solid #eee; }
.content-section h2 {font-size: 24px;margin-bottom: 30px;position: relative;padding-bottom: 15px;}
.content-section h2::after { content: ''; position: absolute; bottom: 0; left: 0; width: 60px; height: 4px; background: var(--primary-color); border-radius: 2px; }
.seo-text { font-size: 16px; color: #444; text-align: justify; }
.friend-links {background: #f1f3f4;padding: 40px 0;}
.friend-links h3 { font-size: 18px; color: #5f6368; margin-bottom: 20px; border-bottom: 1px solid #dadce0; padding-bottom: 10px; }
.link-list { display: flex; flex-wrap: wrap; gap: 15px; }
.link-list a { color: #5f6368; text-decoration: none; font-size: 14px; transition: color 0.2s; }
.link-list a:hover { color: var(--primary-color); text-decoration: underline; }
footer { background: #202124; color: #fff; padding: 40px 0; text-align: center; }
.update-log { background: #e8f0fe; padding: 20px; border-radius: 8px; margin-top: 30px; border-left: 5px solid var(--primary-color); }
.faq-item { margin-bottom: 20px; border-bottom: 1px solid #eee; padding-bottom: 20px; }
.faq-question {font-weight: bold;font-size: 16px;margin-bottom: 10px;color: #202124;}
.faq-answer { color: #5f6368; display: block; }
.index-device-desc{font-size: 14px;color: #80868b;line-height:22px;margin-top: 8px;}
.index-btn_wrap{position: relative;cursor: pointer;display: inline-block;}
.index-code-box{display:flex;align-items:flex-end!important;justify-content:center!important;width:179px!important;height:197px!important;background:url(../img/code-box.png);background-size:179px 197px;position:absolute;top: 66px;left: 17%;z-index:5;display:none!important;}
.index-code-box .index-code{margin-bottom:24px;}
.index-code-box .index-code img{width:136px!important;height:136px!important}
.faq {margin-top: 48px;}
.main_wrap {
    width: 1200px;
    margin: auto;
}
.part-privacy {
    padding: 16px;
    font-size: 16px;
    line-height: 32px;
}
.part-privacy p{
    font-size: 16px;
    line-height: 32px;
}
.page-404 {
    height: 100%;
    text-align: center;
}

.page-404 img {
    width: 40%;
    margin-top: 4rem;
    padding: 0 2rem;
    box-sizing: border-box;
}

.page-404 h1,.page-404 span {
    display: block;
    font-size: 18px;
    color: #333333;
    text-align: center;
    margin-top: 2rem;
}

.page-404 .desc {
    text-align: center;
    font-size: .75rem;
    margin-top: .5rem;
}

.page-404 .desc a {
    color: #3C80F4;
}

.page-404 .btn-lists {
    margin: 1.5rem 0 1rem;
    display: flex;
    justify-content: center;
}

.page-404 .btn-lists a {
    width: 78px;
    height: 33px;
    line-height: 33px;
    text-align: center;
    background: #3C80F4;
    font-size: 12px;
    color: #FFFFFF;
    margin-right: 1.5rem;
}
.complainttips {font-size:14px;}
#to_top {position: fixed;bottom: 150px;right: 270px;cursor: pointer;z-index: 1000;display: none;}
#to_top img {width: 65px;height: 65px;}


/* 移动端适配 */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    .hero h1 { font-size: 32px; }
    .hero p { font-size: 16px; }
    .download-btn {padding: .75rem 0;font-size: 1.125rem;width: 17rem;}
    .download-sub {
        font-size: .875rem;
        margin-top: 1rem;
        column-gap: 0.5rem;
    }
    .main_wrap {
        width: 100%;
        margin: 0 auto;
    }
    .part-privacy {
        margin-top: 2rem;
    }
    .part-privacy {
        padding: 1rem;
        font-size: 0.875rem;
        line-height: 1.75rem;
    }
    .part-privacy p{
        font-size: 0.875rem;
        line-height: 1.75rem;
    }
    .page-404 img {
        width:100%;
    }
    #to_top {position: fixed;bottom: 2rem;right: 1rem;cursor: pointer;z-index: 1000;display: none;}
    #to_top img {width: 2.5rem;height: 2.5rem;}
}